21497625

素因数分解:

$3^2\times 5^3\times {\mathrm{97}}^1\times {\mathrm{197}}^1$

素因数の和:315

約数の個数: 48

約数和(自身を含む): 39351312

約数和(自身を除く): 17853687

約数列:

[1, 3, 5, 9, 15, 25, 45, 75, 97, 125, 197, 225, 291, 375, 485, 591, 873, 985, 1125, 1455, 1773, 2425, 2955, 4365, 4925, 7275, 8865, 12125, 14775, 19109, 21825, 24625, 36375, 44325, 57327, 73875, 95545, 109125, 171981, 221625, 286635, 477725, 859905, 1433175, 2388625, 4299525, 7165875, 21497625]

約数ペア:

[(1, 21497625), (3, 7165875), (5, 4299525), (9, 2388625), (15, 1433175), (25, 859905), (45, 477725), (75, 286635), (97, 221625), (125, 171981), (197, 109125), (225, 95545), (291, 73875), (375, 57327), (485, 44325), (591, 36375), (873, 24625), (985, 21825), (1125, 19109), (1455, 14775), (1773, 12125), (2425, 8865), (2955, 7275), (4365, 4925)]