21507075

素因数分解:

$3^2\times 5^2\times {\mathrm{61}}^1\times {\mathrm{1567}}^1$

素因数の和:1644

約数の個数: 36

約数和(自身を含む): 39178048

約数和(自身を除く): 17670973

約数列:

[1, 3, 5, 9, 15, 25, 45, 61, 75, 183, 225, 305, 549, 915, 1525, 1567, 2745, 4575, 4701, 7835, 13725, 14103, 23505, 39175, 70515, 95587, 117525, 286761, 352575, 477935, 860283, 1433805, 2389675, 4301415, 7169025, 21507075]

約数ペア:

[(1, 21507075), (3, 7169025), (5, 4301415), (9, 2389675), (15, 1433805), (25, 860283), (45, 477935), (61, 352575), (75, 286761), (183, 117525), (225, 95587), (305, 70515), (549, 39175), (915, 23505), (1525, 14103), (1567, 13725), (2745, 7835), (4575, 4701)]