21045705

素因数分解:

$3^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{67}}^1\times {\mathrm{487}}^1$

素因数の和:605

約数の個数: 32

約数和(自身を含む): 35042304

約数和(自身を除く): 13996599

約数列:

[1, 3, 5, 15, 43, 67, 129, 201, 215, 335, 487, 645, 1005, 1461, 2435, 2881, 7305, 8643, 14405, 20941, 32629, 43215, 62823, 97887, 104705, 163145, 314115, 489435, 1403047, 4209141, 7015235, 21045705]

約数ペア:

[(1, 21045705), (3, 7015235), (5, 4209141), (15, 1403047), (43, 489435), (67, 314115), (129, 163145), (201, 104705), (215, 97887), (335, 62823), (487, 43215), (645, 32629), (1005, 20941), (1461, 14405), (2435, 8643), (2881, 7305)]