21315688

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{156733}}^1$

素因数の和:156756

約数の個数: 16

約数和(自身を含む): 42318180

約数和(自身を除く): 21002492

約数列:

[1, 2, 4, 8, 17, 34, 68, 136, 156733, 313466, 626932, 1253864, 2664461, 5328922, 10657844, 21315688]

約数ペア:

[(1, 21315688), (2, 10657844), (4, 5328922), (8, 2664461), (17, 1253864), (34, 626932), (68, 313466), (136, 156733)]