21154595

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{2389}}^1$

素因数の和:2435

約数の個数: 32

約数和(自身を含む): 33039360

約数和(自身を除く): 11884765

約数列:

[1, 5, 7, 11, 23, 35, 55, 77, 115, 161, 253, 385, 805, 1265, 1771, 2389, 8855, 11945, 16723, 26279, 54947, 83615, 131395, 183953, 274735, 384629, 604417, 919765, 1923145, 3022085, 4230919, 21154595]

約数ペア:

[(1, 21154595), (5, 4230919), (7, 3022085), (11, 1923145), (23, 919765), (35, 604417), (55, 384629), (77, 274735), (115, 183953), (161, 131395), (253, 83615), (385, 54947), (805, 26279), (1265, 16723), (1771, 11945), (2389, 8855)]