21087664

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{101383}}^1$

素因数の和:101404

約数の個数: 20

約数和(自身を含む): 44000656

約数和(自身を除く): 22912992

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 101383, 202766, 405532, 811064, 1317979, 1622128, 2635958, 5271916, 10543832, 21087664]

約数ペア:

[(1, 21087664), (2, 10543832), (4, 5271916), (8, 2635958), (13, 1622128), (16, 1317979), (26, 811064), (52, 405532), (104, 202766), (208, 101383)]