639693

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{113}}^1$

素因数の和:173

約数の個数: 24

約数和(自身を含む): 1013688

約数和(自身を除く): 373995

約数列:

[1, 3, 9, 17, 37, 51, 111, 113, 153, 333, 339, 629, 1017, 1887, 1921, 4181, 5661, 5763, 12543, 17289, 37629, 71077, 213231, 639693]

約数ペア:

[(1, 639693), (3, 213231), (9, 71077), (17, 37629), (37, 17289), (51, 12543), (111, 5763), (113, 5661), (153, 4181), (333, 1921), (339, 1887), (629, 1017)]