128257960

素因数分解:

$2^3\times 5^1\times {\mathrm{1091}}^1\times {\mathrm{2939}}^1$

素因数の和:4041

約数の個数: 32

約数和(自身を含む): 288943200

約数和(自身を除く): 160685240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1091, 2182, 2939, 4364, 5455, 5878, 8728, 10910, 11756, 14695, 21820, 23512, 29390, 43640, 58780, 117560, 3206449, 6412898, 12825796, 16032245, 25651592, 32064490, 64128980, 128257960]

約数ペア:

[(1, 128257960), (2, 64128980), (4, 32064490), (5, 25651592), (8, 16032245), (10, 12825796), (20, 6412898), (40, 3206449), (1091, 117560), (2182, 58780), (2939, 43640), (4364, 29390), (5455, 23512), (5878, 21820), (8728, 14695), (10910, 11756)]