128631356

素因数分解:

$2^2\times 7^1\times {\mathrm{29}}^1\times {\mathrm{157}}^1\times {\mathrm{1009}}^1$

素因数の和:1206

約数の個数: 48

約数和(自身を含む): 268094400

約数和(自身を除く): 139463044

約数列:

[1, 2, 4, 7, 14, 28, 29, 58, 116, 157, 203, 314, 406, 628, 812, 1009, 1099, 2018, 2198, 4036, 4396, 4553, 7063, 9106, 14126, 18212, 28252, 29261, 31871, 58522, 63742, 117044, 127484, 158413, 204827, 316826, 409654, 633652, 819308, 1108891, 2217782, 4435564, 4593977, 9187954, 18375908, 32157839, 64315678, 128631356]

約数ペア:

[(1, 128631356), (2, 64315678), (4, 32157839), (7, 18375908), (14, 9187954), (28, 4593977), (29, 4435564), (58, 2217782), (116, 1108891), (157, 819308), (203, 633652), (314, 409654), (406, 316826), (628, 204827), (812, 158413), (1009, 127484), (1099, 117044), (2018, 63742), (2198, 58522), (4036, 31871), (4396, 29261), (4553, 28252), (7063, 18212), (9106, 14126)]