19959905

素因数分解:

$5^1\times 7^2\times {\mathrm{257}}^1\times {\mathrm{317}}^1$

素因数の和:593

約数の個数: 24

約数和(自身を含む): 28059048

約数和(自身を除く): 8099143

約数列:

[1, 5, 7, 35, 49, 245, 257, 317, 1285, 1585, 1799, 2219, 8995, 11095, 12593, 15533, 62965, 77665, 81469, 407345, 570283, 2851415, 3991981, 19959905]

約数ペア:

[(1, 19959905), (5, 3991981), (7, 2851415), (35, 570283), (49, 407345), (245, 81469), (257, 77665), (317, 62965), (1285, 15533), (1585, 12593), (1799, 11095), (2219, 8995)]