18639725

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{83}}^1\times {\mathrm{691}}^1$

素因数の和:797

約数の個数: 24

約数和(自身を含む): 25227552

約数和(自身を除く): 6587827

約数列:

[1, 5, 13, 25, 65, 83, 325, 415, 691, 1079, 2075, 3455, 5395, 8983, 17275, 26975, 44915, 57353, 224575, 286765, 745589, 1433825, 3727945, 18639725]

約数ペア:

[(1, 18639725), (5, 3727945), (13, 1433825), (25, 745589), (65, 286765), (83, 224575), (325, 57353), (415, 44915), (691, 26975), (1079, 17275), (2075, 8983), (3455, 5395)]