28508405

素因数分解:

$5^1\times {\mathrm{17}}^2\times {\mathrm{109}}^1\times {\mathrm{181}}^1$

素因数の和:329

約数の個数: 24

約数和(自身を含む): 36876840

約数和(自身を除く): 8368435

約数列:

[1, 5, 17, 85, 109, 181, 289, 545, 905, 1445, 1853, 3077, 9265, 15385, 19729, 31501, 52309, 98645, 157505, 261545, 335393, 1676965, 5701681, 28508405]

約数ペア:

[(1, 28508405), (5, 5701681), (17, 1676965), (85, 335393), (109, 261545), (181, 157505), (289, 98645), (545, 52309), (905, 31501), (1445, 19729), (1853, 15385), (3077, 9265)]