128389456

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{617257}}^1$

素因数の和:617278

約数の個数: 20

約数和(自身を含む): 267889972

約数和(自身を除く): 139500516

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 617257, 1234514, 2469028, 4938056, 8024341, 9876112, 16048682, 32097364, 64194728, 128389456]

約数ペア:

[(1, 128389456), (2, 64194728), (4, 32097364), (8, 16048682), (13, 9876112), (16, 8024341), (26, 4938056), (52, 2469028), (104, 1234514), (208, 617257)]