81438660

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{7417}}^1$

素因数の和:7493

約数の個数: 72

約数和(自身を含む): 251114136

約数和(自身を除く): 169675476

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 61, 90, 122, 180, 183, 244, 305, 366, 549, 610, 732, 915, 1098, 1220, 1830, 2196, 2745, 3660, 5490, 7417, 10980, 14834, 22251, 29668, 37085, 44502, 66753, 74170, 89004, 111255, 133506, 148340, 222510, 267012, 333765, 445020, 452437, 667530, 904874, 1335060, 1357311, 1809748, 2262185, 2714622, 4071933, 4524370, 5429244, 6786555, 8143866, 9048740, 13573110, 16287732, 20359665, 27146220, 40719330, 81438660]

約数ペア:

[(1, 81438660), (2, 40719330), (3, 27146220), (4, 20359665), (5, 16287732), (6, 13573110), (9, 9048740), (10, 8143866), (12, 6786555), (15, 5429244), (18, 4524370), (20, 4071933), (30, 2714622), (36, 2262185), (45, 1809748), (60, 1357311), (61, 1335060), (90, 904874), (122, 667530), (180, 452437), (183, 445020), (244, 333765), (305, 267012), (366, 222510), (549, 148340), (610, 133506), (732, 111255), (915, 89004), (1098, 74170), (1220, 66753), (1830, 44502), (2196, 37085), (2745, 29668), (3660, 22251), (5490, 14834), (7417, 10980)]