21965360

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{521}}^1$

素因数の和:582

約数の個数: 80

約数和(自身を含む): 55924992

約数和(自身を除く): 33959632

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 31, 34, 40, 62, 68, 80, 85, 124, 136, 155, 170, 248, 272, 310, 340, 496, 521, 527, 620, 680, 1042, 1054, 1240, 1360, 2084, 2108, 2480, 2605, 2635, 4168, 4216, 5210, 5270, 8336, 8432, 8857, 10420, 10540, 16151, 17714, 20840, 21080, 32302, 35428, 41680, 42160, 44285, 64604, 70856, 80755, 88570, 129208, 141712, 161510, 177140, 258416, 274567, 323020, 354280, 549134, 646040, 708560, 1098268, 1292080, 1372835, 2196536, 2745670, 4393072, 5491340, 10982680, 21965360]

約数ペア:

[(1, 21965360), (2, 10982680), (4, 5491340), (5, 4393072), (8, 2745670), (10, 2196536), (16, 1372835), (17, 1292080), (20, 1098268), (31, 708560), (34, 646040), (40, 549134), (62, 354280), (68, 323020), (80, 274567), (85, 258416), (124, 177140), (136, 161510), (155, 141712), (170, 129208), (248, 88570), (272, 80755), (310, 70856), (340, 64604), (496, 44285), (521, 42160), (527, 41680), (620, 35428), (680, 32302), (1042, 21080), (1054, 20840), (1240, 17714), (1360, 16151), (2084, 10540), (2108, 10420), (2480, 8857), (2605, 8432), (2635, 8336), (4168, 5270), (4216, 5210)]