21718775

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{3931}}^1$

素因数の和:3971

約数の個数: 24

約数和(自身を含む): 30716784

約数和(自身を除く): 8998009

約数列:

[1, 5, 13, 17, 25, 65, 85, 221, 325, 425, 1105, 3931, 5525, 19655, 51103, 66827, 98275, 255515, 334135, 868751, 1277575, 1670675, 4343755, 21718775]

約数ペア:

[(1, 21718775), (5, 4343755), (13, 1670675), (17, 1277575), (25, 868751), (65, 334135), (85, 255515), (221, 98275), (325, 66827), (425, 51103), (1105, 19655), (3931, 5525)]