21779225

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{3527}}^1$

素因数の和:3569

約数の個数: 24

約数和(自身を含む): 30623040

約数和(自身を除く): 8843815

約数列:

[1, 5, 13, 19, 25, 65, 95, 247, 325, 475, 1235, 3527, 6175, 17635, 45851, 67013, 88175, 229255, 335065, 871169, 1146275, 1675325, 4355845, 21779225]

約数ペア:

[(1, 21779225), (5, 4355845), (13, 1675325), (19, 1146275), (25, 871169), (65, 335065), (95, 229255), (247, 88175), (325, 67013), (475, 45851), (1235, 17635), (3527, 6175)]