21259384

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{156319}}^1$

素因数の和:156342

約数の個数: 16

約数和(自身を含む): 42206400

約数和(自身を除く): 20947016

約数列:

[1, 2, 4, 8, 17, 34, 68, 136, 156319, 312638, 625276, 1250552, 2657423, 5314846, 10629692, 21259384]

約数ペア:

[(1, 21259384), (2, 10629692), (4, 5314846), (8, 2657423), (17, 1250552), (34, 625276), (68, 312638), (136, 156319)]