21294075

素因数分解:

$3^1\times 5^2\times {\mathrm{11}}^1\times {\mathrm{53}}^1\times {\mathrm{487}}^1$

素因数の和:564

約数の個数: 48

約数和(自身を含む): 39211776

約数和(自身を除く): 17917701

約数列:

[1, 3, 5, 11, 15, 25, 33, 53, 55, 75, 159, 165, 265, 275, 487, 583, 795, 825, 1325, 1461, 1749, 2435, 2915, 3975, 5357, 7305, 8745, 12175, 14575, 16071, 25811, 26785, 36525, 43725, 77433, 80355, 129055, 133925, 283921, 387165, 401775, 645275, 851763, 1419605, 1935825, 4258815, 7098025, 21294075]

約数ペア:

[(1, 21294075), (3, 7098025), (5, 4258815), (11, 1935825), (15, 1419605), (25, 851763), (33, 645275), (53, 401775), (55, 387165), (75, 283921), (159, 133925), (165, 129055), (265, 80355), (275, 77433), (487, 43725), (583, 36525), (795, 26785), (825, 25811), (1325, 16071), (1461, 14575), (1749, 12175), (2435, 8745), (2915, 7305), (3975, 5357)]