21715920

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{30161}}^1$

素因数の和:30180

約数の個数: 60

約数和(自身を含む): 72931716

約数和(自身を除く): 51215796

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 36, 40, 45, 48, 60, 72, 80, 90, 120, 144, 180, 240, 360, 720, 30161, 60322, 90483, 120644, 150805, 180966, 241288, 271449, 301610, 361932, 452415, 482576, 542898, 603220, 723864, 904830, 1085796, 1206440, 1357245, 1447728, 1809660, 2171592, 2412880, 2714490, 3619320, 4343184, 5428980, 7238640, 10857960, 21715920]

約数ペア:

[(1, 21715920), (2, 10857960), (3, 7238640), (4, 5428980), (5, 4343184), (6, 3619320), (8, 2714490), (9, 2412880), (10, 2171592), (12, 1809660), (15, 1447728), (16, 1357245), (18, 1206440), (20, 1085796), (24, 904830), (30, 723864), (36, 603220), (40, 542898), (45, 482576), (48, 452415), (60, 361932), (72, 301610), (80, 271449), (90, 241288), (120, 180966), (144, 150805), (180, 120644), (240, 90483), (360, 60322), (720, 30161)]