1640520

素因数分解:

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

素因数の和:65

約数の個数: 192

約数和(自身を含む): 6566400

約数和(自身を除く): 4925880

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 18, 20, 21, 24, 27, 28, 30, 31, 35, 36, 40, 42, 45, 49, 54, 56, 60, 62, 63, 70, 72, 84, 90, 93, 98, 105, 108, 120, 124, 126, 135, 140, 147, 155, 168, 180, 186, 189, 196, 210, 216, 217, 245, 248, 252, 270, 279, 280, 294, 310, 315, 360, 372, 378, 392, 420, 434, 441, 465, 490, 504, 540, 558, 588, 620, 630, 651, 735, 744, 756, 837, 840, 868, 882, 930, 945, 980, 1080, 1085, 1116, 1176, 1240, 1260, 1302, 1323, 1395, 1470, 1512, 1519, 1674, 1736, 1764, 1860, 1890, 1953, 1960, 2170, 2205, 2232, 2520, 2604, 2646, 2790, 2940, 3038, 3255, 3348, 3528, 3720, 3780, 3906, 4185, 4340, 4410, 4557, 5208, 5292, 5580, 5859, 5880, 6076, 6510, 6615, 6696, 7560, 7595, 7812, 8370, 8680, 8820, 9114, 9765, 10584, 11160, 11718, 12152, 13020, 13230, 13671, 15190, 15624, 16740, 17640, 18228, 19530, 22785, 23436, 26040, 26460, 27342, 29295, 30380, 33480, 36456, 39060, 41013, 45570, 46872, 52920, 54684, 58590, 60760, 68355, 78120, 82026, 91140, 109368, 117180, 136710, 164052, 182280, 205065, 234360, 273420, 328104, 410130, 546840, 820260, 1640520]

約数ペア:

[(1, 1640520), (2, 820260), (3, 546840), (4, 410130), (5, 328104), (6, 273420), (7, 234360), (8, 205065), (9, 182280), (10, 164052), (12, 136710), (14, 117180), (15, 109368), (18, 91140), (20, 82026), (21, 78120), (24, 68355), (27, 60760), (28, 58590), (30, 54684), (31, 52920), (35, 46872), (36, 45570), (40, 41013), (42, 39060), (45, 36456), (49, 33480), (54, 30380), (56, 29295), (60, 27342), (62, 26460), (63, 26040), (70, 23436), (72, 22785), (84, 19530), (90, 18228), (93, 17640), (98, 16740), (105, 15624), (108, 15190), (120, 13671), (124, 13230), (126, 13020), (135, 12152), (140, 11718), (147, 11160), (155, 10584), (168, 9765), (180, 9114), (186, 8820), (189, 8680), (196, 8370), (210, 7812), (216, 7595), (217, 7560), (245, 6696), (248, 6615), (252, 6510), (270, 6076), (279, 5880), (280, 5859), (294, 5580), (310, 5292), (315, 5208), (360, 4557), (372, 4410), (378, 4340), (392, 4185), (420, 3906), (434, 3780), (441, 3720), (465, 3528), (490, 3348), (504, 3255), (540, 3038), (558, 2940), (588, 2790), (620, 2646), (630, 2604), (651, 2520), (735, 2232), (744, 2205), (756, 2170), (837, 1960), (840, 1953), (868, 1890), (882, 1860), (930, 1764), (945, 1736), (980, 1674), (1080, 1519), (1085, 1512), (1116, 1470), (1176, 1395), (1240, 1323), (1260, 1302)]