21688275

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{109}}^1\times {\mathrm{379}}^1$

素因数の和:508

約数の個数: 48

約数和(自身を含む): 41465600

約数和(自身を除く): 19777325

約数列:

[1, 3, 5, 7, 15, 21, 25, 35, 75, 105, 109, 175, 327, 379, 525, 545, 763, 1137, 1635, 1895, 2289, 2653, 2725, 3815, 5685, 7959, 8175, 9475, 11445, 13265, 19075, 28425, 39795, 41311, 57225, 66325, 123933, 198975, 206555, 289177, 619665, 867531, 1032775, 1445885, 3098325, 4337655, 7229425, 21688275]

約数ペア:

[(1, 21688275), (3, 7229425), (5, 4337655), (7, 3098325), (15, 1445885), (21, 1032775), (25, 867531), (35, 619665), (75, 289177), (105, 206555), (109, 198975), (175, 123933), (327, 66325), (379, 57225), (525, 41311), (545, 39795), (763, 28425), (1137, 19075), (1635, 13265), (1895, 11445), (2289, 9475), (2653, 8175), (2725, 7959), (3815, 5685)]