21658160

素因数分解:

$2^4\times 5^1\times {\mathrm{97}}^1\times {\mathrm{2791}}^1$

素因数の和:2901

約数の個数: 40

約数和(自身を含む): 50892576

約数和(自身を除く): 29234416

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 97, 194, 388, 485, 776, 970, 1552, 1940, 2791, 3880, 5582, 7760, 11164, 13955, 22328, 27910, 44656, 55820, 111640, 223280, 270727, 541454, 1082908, 1353635, 2165816, 2707270, 4331632, 5414540, 10829080, 21658160]

約数ペア:

[(1, 21658160), (2, 10829080), (4, 5414540), (5, 4331632), (8, 2707270), (10, 2165816), (16, 1353635), (20, 1082908), (40, 541454), (80, 270727), (97, 223280), (194, 111640), (388, 55820), (485, 44656), (776, 27910), (970, 22328), (1552, 13955), (1940, 11164), (2791, 7760), (3880, 5582)]