21111025

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{3821}}^1$

素因数の和:3861

約数の個数: 24

約数和(自身を含む): 29857464

約数和(自身を除く): 8746439

約数列:

[1, 5, 13, 17, 25, 65, 85, 221, 325, 425, 1105, 3821, 5525, 19105, 49673, 64957, 95525, 248365, 324785, 844441, 1241825, 1623925, 4222205, 21111025]

約数ペア:

[(1, 21111025), (5, 4222205), (13, 1623925), (17, 1241825), (25, 844441), (65, 324785), (85, 248365), (221, 95525), (325, 64957), (425, 49673), (1105, 19105), (3821, 5525)]