20280728

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{11471}}^1$

素因数の和:11507

約数の個数: 32

約数和(自身を含む): 43364160

約数和(自身を除く): 23083432

約数列:

[1, 2, 4, 8, 13, 17, 26, 34, 52, 68, 104, 136, 221, 442, 884, 1768, 11471, 22942, 45884, 91768, 149123, 195007, 298246, 390014, 596492, 780028, 1192984, 1560056, 2535091, 5070182, 10140364, 20280728]

約数ペア:

[(1, 20280728), (2, 10140364), (4, 5070182), (8, 2535091), (13, 1560056), (17, 1192984), (26, 780028), (34, 596492), (52, 390014), (68, 298246), (104, 195007), (136, 149123), (221, 91768), (442, 45884), (884, 22942), (1768, 11471)]