21600180

素因数分解:

$2^2\times 3^2\times 5^1\times 7^2\times {\mathrm{31}}^1\times {\mathrm{79}}^1$

素因数の和:139

約数の個数: 216

約数和(自身を含む): 79672320

約数和(自身を除く): 58072140

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 31, 35, 36, 42, 45, 49, 60, 62, 63, 70, 79, 84, 90, 93, 98, 105, 124, 126, 140, 147, 155, 158, 180, 186, 196, 210, 217, 237, 245, 252, 279, 294, 310, 315, 316, 372, 395, 420, 434, 441, 465, 474, 490, 553, 558, 588, 620, 630, 651, 711, 735, 790, 868, 882, 930, 948, 980, 1085, 1106, 1116, 1185, 1260, 1302, 1395, 1422, 1470, 1519, 1580, 1659, 1764, 1860, 1953, 2170, 2205, 2212, 2370, 2449, 2604, 2765, 2790, 2844, 2940, 3038, 3255, 3318, 3555, 3871, 3906, 4340, 4410, 4557, 4740, 4898, 4977, 5530, 5580, 6076, 6510, 6636, 7110, 7347, 7595, 7742, 7812, 8295, 8820, 9114, 9765, 9796, 9954, 11060, 11613, 12245, 13020, 13671, 14220, 14694, 15190, 15484, 16590, 17143, 18228, 19355, 19530, 19908, 22041, 22785, 23226, 24490, 24885, 27342, 29388, 30380, 33180, 34286, 34839, 36735, 38710, 39060, 44082, 45570, 46452, 48980, 49770, 51429, 54684, 58065, 68355, 68572, 69678, 73470, 77420, 85715, 88164, 91140, 99540, 102858, 110205, 116130, 120001, 136710, 139356, 146940, 154287, 171430, 174195, 205716, 220410, 232260, 240002, 257145, 273420, 308574, 342860, 348390, 360003, 440820, 480004, 514290, 600005, 617148, 696780, 720006, 771435, 1028580, 1080009, 1200010, 1440012, 1542870, 1800015, 2160018, 2400020, 3085740, 3600030, 4320036, 5400045, 7200060, 10800090, 21600180]

約数ペア:

[(1, 21600180), (2, 10800090), (3, 7200060), (4, 5400045), (5, 4320036), (6, 3600030), (7, 3085740), (9, 2400020), (10, 2160018), (12, 1800015), (14, 1542870), (15, 1440012), (18, 1200010), (20, 1080009), (21, 1028580), (28, 771435), (30, 720006), (31, 696780), (35, 617148), (36, 600005), (42, 514290), (45, 480004), (49, 440820), (60, 360003), (62, 348390), (63, 342860), (70, 308574), (79, 273420), (84, 257145), (90, 240002), (93, 232260), (98, 220410), (105, 205716), (124, 174195), (126, 171430), (140, 154287), (147, 146940), (155, 139356), (158, 136710), (180, 120001), (186, 116130), (196, 110205), (210, 102858), (217, 99540), (237, 91140), (245, 88164), (252, 85715), (279, 77420), (294, 73470), (310, 69678), (315, 68572), (316, 68355), (372, 58065), (395, 54684), (420, 51429), (434, 49770), (441, 48980), (465, 46452), (474, 45570), (490, 44082), (553, 39060), (558, 38710), (588, 36735), (620, 34839), (630, 34286), (651, 33180), (711, 30380), (735, 29388), (790, 27342), (868, 24885), (882, 24490), (930, 23226), (948, 22785), (980, 22041), (1085, 19908), (1106, 19530), (1116, 19355), (1185, 18228), (1260, 17143), (1302, 16590), (1395, 15484), (1422, 15190), (1470, 14694), (1519, 14220), (1580, 13671), (1659, 13020), (1764, 12245), (1860, 11613), (1953, 11060), (2170, 9954), (2205, 9796), (2212, 9765), (2370, 9114), (2449, 8820), (2604, 8295), (2765, 7812), (2790, 7742), (2844, 7595), (2940, 7347), (3038, 7110), (3255, 6636), (3318, 6510), (3555, 6076), (3871, 5580), (3906, 5530), (4340, 4977), (4410, 4898), (4557, 4740)]