20857960

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{17981}}^1$

素因数の和:18021

約数の個数: 32

約数和(自身を含む): 48551400

約数和(自身を除く): 27693440

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 40, 58, 116, 145, 232, 290, 580, 1160, 17981, 35962, 71924, 89905, 143848, 179810, 359620, 521449, 719240, 1042898, 2085796, 2607245, 4171592, 5214490, 10428980, 20857960]

約数ペア:

[(1, 20857960), (2, 10428980), (4, 5214490), (5, 4171592), (8, 2607245), (10, 2085796), (20, 1042898), (29, 719240), (40, 521449), (58, 359620), (116, 179810), (145, 143848), (232, 89905), (290, 71924), (580, 35962), (1160, 17981)]