20972575

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{1373}}^1$

素因数の和:1443

約数の個数: 24

約数和(自身を含む): 28623168

約数和(自身を除く): 7650593

約数列:

[1, 5, 13, 25, 47, 65, 235, 325, 611, 1175, 1373, 3055, 6865, 15275, 17849, 34325, 64531, 89245, 322655, 446225, 838903, 1613275, 4194515, 20972575]

約数ペア:

[(1, 20972575), (5, 4194515), (13, 1613275), (25, 838903), (47, 446225), (65, 322655), (235, 89245), (325, 64531), (611, 34325), (1175, 17849), (1373, 15275), (3055, 6865)]