21658325

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{103}}^1\times {\mathrm{647}}^1$

素因数の和:773

約数の個数: 24

約数和(自身を含む): 29248128

約数和(自身を除く): 7589803

約数列:

[1, 5, 13, 25, 65, 103, 325, 515, 647, 1339, 2575, 3235, 6695, 8411, 16175, 33475, 42055, 66641, 210275, 333205, 866333, 1666025, 4331665, 21658325]

約数ペア:

[(1, 21658325), (5, 4331665), (13, 1666025), (25, 866333), (65, 333205), (103, 210275), (325, 66641), (515, 42055), (647, 33475), (1339, 16175), (2575, 8411), (3235, 6695)]