21482500

素因数分解:

$2^2\times 5^4\times {\mathrm{13}}^1\times {\mathrm{661}}^1$

素因数の和:698

約数の個数: 60

約数和(自身を含む): 50668156

約数和(自身を除く): 29185656

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 50, 52, 65, 100, 125, 130, 250, 260, 325, 500, 625, 650, 661, 1250, 1300, 1322, 1625, 2500, 2644, 3250, 3305, 6500, 6610, 8125, 8593, 13220, 16250, 16525, 17186, 32500, 33050, 34372, 42965, 66100, 82625, 85930, 165250, 171860, 214825, 330500, 413125, 429650, 826250, 859300, 1074125, 1652500, 2148250, 4296500, 5370625, 10741250, 21482500]

約数ペア:

[(1, 21482500), (2, 10741250), (4, 5370625), (5, 4296500), (10, 2148250), (13, 1652500), (20, 1074125), (25, 859300), (26, 826250), (50, 429650), (52, 413125), (65, 330500), (100, 214825), (125, 171860), (130, 165250), (250, 85930), (260, 82625), (325, 66100), (500, 42965), (625, 34372), (650, 33050), (661, 32500), (1250, 17186), (1300, 16525), (1322, 16250), (1625, 13220), (2500, 8593), (2644, 8125), (3250, 6610), (3305, 6500)]