200920025

素因数分解:

$5^2\times {\mathrm{17}}^2\times {\mathrm{27809}}^1$

素因数の和:27853

約数の個数: 18

約数和(自身を含む): 264667770

約数和(自身を除く): 63747745

約数列:

[1, 5, 17, 25, 85, 289, 425, 1445, 7225, 27809, 139045, 472753, 695225, 2363765, 8036801, 11818825, 40184005, 200920025]

約数ペア:

[(1, 200920025), (5, 40184005), (17, 11818825), (25, 8036801), (85, 2363765), (289, 695225), (425, 472753), (1445, 139045), (7225, 27809)]