156978980

素因数分解:

$2^2\times 5^1\times {\mathrm{97}}^1\times {\mathrm{80917}}^1$

素因数の和:81023

約数の個数: 24

約数和(自身を含む): 333058488

約数和(自身を除く): 176079508

約数列:

[1, 2, 4, 5, 10, 20, 97, 194, 388, 485, 970, 1940, 80917, 161834, 323668, 404585, 809170, 1618340, 7848949, 15697898, 31395796, 39244745, 78489490, 156978980]

約数ペア:

[(1, 156978980), (2, 78489490), (4, 39244745), (5, 31395796), (10, 15697898), (20, 7848949), (97, 1618340), (194, 809170), (388, 404585), (485, 323668), (970, 161834), (1940, 80917)]