21218600

素因数分解:

$2^3\times 5^2\times {\mathrm{13}}^1\times {\mathrm{8161}}^1$

素因数の和:8190

約数の個数: 48

約数和(自身を含む): 53134620

約数和(自身を除く): 31916020

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 25, 26, 40, 50, 52, 65, 100, 104, 130, 200, 260, 325, 520, 650, 1300, 2600, 8161, 16322, 32644, 40805, 65288, 81610, 106093, 163220, 204025, 212186, 326440, 408050, 424372, 530465, 816100, 848744, 1060930, 1632200, 2121860, 2652325, 4243720, 5304650, 10609300, 21218600]

約数ペア:

[(1, 21218600), (2, 10609300), (4, 5304650), (5, 4243720), (8, 2652325), (10, 2121860), (13, 1632200), (20, 1060930), (25, 848744), (26, 816100), (40, 530465), (50, 424372), (52, 408050), (65, 326440), (100, 212186), (104, 204025), (130, 163220), (200, 106093), (260, 81610), (325, 65288), (520, 40805), (650, 32644), (1300, 16322), (2600, 8161)]