21318716

素因数分解:

$2^2\times {\mathrm{83}}^1\times {\mathrm{157}}^1\times {\mathrm{409}}^1$

素因数の和:653

約数の個数: 24

約数和(自身を含む): 38090640

約数和(自身を除く): 16771924

約数列:

[1, 2, 4, 83, 157, 166, 314, 332, 409, 628, 818, 1636, 13031, 26062, 33947, 52124, 64213, 67894, 128426, 135788, 256852, 5329679, 10659358, 21318716]

約数ペア:

[(1, 21318716), (2, 10659358), (4, 5329679), (83, 256852), (157, 135788), (166, 128426), (314, 67894), (332, 64213), (409, 52124), (628, 33947), (818, 26062), (1636, 13031)]