21170520

素因数分解:

$2^3\times 3^2\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{271}}^1$

素因数の和:326

約数の個数: 192

約数和(自身を含む): 81469440

約数和(自身を除く): 60298920

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 18, 20, 21, 24, 28, 30, 31, 35, 36, 40, 42, 45, 56, 60, 62, 63, 70, 72, 84, 90, 93, 105, 120, 124, 126, 140, 155, 168, 180, 186, 210, 217, 248, 252, 271, 279, 280, 310, 315, 360, 372, 420, 434, 465, 504, 542, 558, 620, 630, 651, 744, 813, 840, 868, 930, 1084, 1085, 1116, 1240, 1260, 1302, 1355, 1395, 1626, 1736, 1860, 1897, 1953, 2168, 2170, 2232, 2439, 2520, 2604, 2710, 2790, 3252, 3255, 3720, 3794, 3906, 4065, 4340, 4878, 5208, 5420, 5580, 5691, 6504, 6510, 7588, 7812, 8130, 8401, 8680, 9485, 9756, 9765, 10840, 11160, 11382, 12195, 13020, 15176, 15624, 16260, 16802, 17073, 18970, 19512, 19530, 22764, 24390, 25203, 26040, 28455, 32520, 33604, 34146, 37940, 39060, 42005, 45528, 48780, 50406, 56910, 58807, 67208, 68292, 75609, 75880, 78120, 84010, 85365, 97560, 100812, 113820, 117614, 126015, 136584, 151218, 168020, 170730, 176421, 201624, 227640, 235228, 252030, 294035, 302436, 336040, 341460, 352842, 378045, 470456, 504060, 529263, 588070, 604872, 682920, 705684, 756090, 882105, 1008120, 1058526, 1176140, 1411368, 1512180, 1764210, 2117052, 2352280, 2646315, 3024360, 3528420, 4234104, 5292630, 7056840, 10585260, 21170520]

約数ペア:

[(1, 21170520), (2, 10585260), (3, 7056840), (4, 5292630), (5, 4234104), (6, 3528420), (7, 3024360), (8, 2646315), (9, 2352280), (10, 2117052), (12, 1764210), (14, 1512180), (15, 1411368), (18, 1176140), (20, 1058526), (21, 1008120), (24, 882105), (28, 756090), (30, 705684), (31, 682920), (35, 604872), (36, 588070), (40, 529263), (42, 504060), (45, 470456), (56, 378045), (60, 352842), (62, 341460), (63, 336040), (70, 302436), (72, 294035), (84, 252030), (90, 235228), (93, 227640), (105, 201624), (120, 176421), (124, 170730), (126, 168020), (140, 151218), (155, 136584), (168, 126015), (180, 117614), (186, 113820), (210, 100812), (217, 97560), (248, 85365), (252, 84010), (271, 78120), (279, 75880), (280, 75609), (310, 68292), (315, 67208), (360, 58807), (372, 56910), (420, 50406), (434, 48780), (465, 45528), (504, 42005), (542, 39060), (558, 37940), (620, 34146), (630, 33604), (651, 32520), (744, 28455), (813, 26040), (840, 25203), (868, 24390), (930, 22764), (1084, 19530), (1085, 19512), (1116, 18970), (1240, 17073), (1260, 16802), (1302, 16260), (1355, 15624), (1395, 15176), (1626, 13020), (1736, 12195), (1860, 11382), (1897, 11160), (1953, 10840), (2168, 9765), (2170, 9756), (2232, 9485), (2439, 8680), (2520, 8401), (2604, 8130), (2710, 7812), (2790, 7588), (3252, 6510), (3255, 6504), (3720, 5691), (3794, 5580), (3906, 5420), (4065, 5208), (4340, 4878)]