21508725

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{53}}^1\times {\mathrm{773}}^1$

素因数の和:846

約数の個数: 48

約数和(自身を含む): 41461632

約数和(自身を除く): 19952907

約数列:

[1, 3, 5, 7, 15, 21, 25, 35, 53, 75, 105, 159, 175, 265, 371, 525, 773, 795, 1113, 1325, 1855, 2319, 3865, 3975, 5411, 5565, 9275, 11595, 16233, 19325, 27055, 27825, 40969, 57975, 81165, 122907, 135275, 204845, 286783, 405825, 614535, 860349, 1024225, 1433915, 3072675, 4301745, 7169575, 21508725]

約数ペア:

[(1, 21508725), (3, 7169575), (5, 4301745), (7, 3072675), (15, 1433915), (21, 1024225), (25, 860349), (35, 614535), (53, 405825), (75, 286783), (105, 204845), (159, 135275), (175, 122907), (265, 81165), (371, 57975), (525, 40969), (773, 27825), (795, 27055), (1113, 19325), (1325, 16233), (1855, 11595), (2319, 9275), (3865, 5565), (3975, 5411)]