21894525

素因数分解:

$3^2\times 5^2\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{73}}^1$

素因数の和:163

約数の個数: 72

約数和(自身を含む): 41989376

約数和(自身を除く): 20094851

約数列:

[1, 3, 5, 9, 15, 25, 31, 43, 45, 73, 75, 93, 129, 155, 215, 219, 225, 279, 365, 387, 465, 645, 657, 775, 1075, 1095, 1333, 1395, 1825, 1935, 2263, 2325, 3139, 3225, 3285, 3999, 5475, 6665, 6789, 6975, 9417, 9675, 11315, 11997, 15695, 16425, 19995, 20367, 28251, 33325, 33945, 47085, 56575, 59985, 78475, 97309, 99975, 101835, 141255, 169725, 235425, 291927, 299925, 486545, 509175, 706275, 875781, 1459635, 2432725, 4378905, 7298175, 21894525]

約数ペア:

[(1, 21894525), (3, 7298175), (5, 4378905), (9, 2432725), (15, 1459635), (25, 875781), (31, 706275), (43, 509175), (45, 486545), (73, 299925), (75, 291927), (93, 235425), (129, 169725), (155, 141255), (215, 101835), (219, 99975), (225, 97309), (279, 78475), (365, 59985), (387, 56575), (465, 47085), (645, 33945), (657, 33325), (775, 28251), (1075, 20367), (1095, 19995), (1333, 16425), (1395, 15695), (1825, 11997), (1935, 11315), (2263, 9675), (2325, 9417), (3139, 6975), (3225, 6789), (3285, 6665), (3999, 5475)]