21250871840

素因数分解:

$2^5\times 5^1\times {\mathrm{11}}^2\times {\mathrm{1097669}}^1$

素因数の和:1097706

約数の個数: 72

約数和(自身を含む): 55184261580

約数和(自身を除く): 33933389740

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 44, 55, 80, 88, 110, 121, 160, 176, 220, 242, 352, 440, 484, 605, 880, 968, 1210, 1760, 1936, 2420, 3872, 4840, 9680, 19360, 1097669, 2195338, 4390676, 5488345, 8781352, 10976690, 12074359, 17562704, 21953380, 24148718, 35125408, 43906760, 48297436, 60371795, 87813520, 96594872, 120743590, 132817949, 175627040, 193189744, 241487180, 265635898, 386379488, 482974360, 531271796, 664089745, 965948720, 1062543592, 1328179490, 1931897440, 2125087184, 2656358980, 4250174368, 5312717960, 10625435920, 21250871840]

約数ペア:

[(1, 21250871840), (2, 10625435920), (4, 5312717960), (5, 4250174368), (8, 2656358980), (10, 2125087184), (11, 1931897440), (16, 1328179490), (20, 1062543592), (22, 965948720), (32, 664089745), (40, 531271796), (44, 482974360), (55, 386379488), (80, 265635898), (88, 241487180), (110, 193189744), (121, 175627040), (160, 132817949), (176, 120743590), (220, 96594872), (242, 87813520), (352, 60371795), (440, 48297436), (484, 43906760), (605, 35125408), (880, 24148718), (968, 21953380), (1210, 17562704), (1760, 12074359), (1936, 10976690), (2420, 8781352), (3872, 5488345), (4840, 4390676), (9680, 2195338), (19360, 1097669)]