19987725

素因数分解:

$3^1\times 5^2\times {\mathrm{59}}^1\times {\mathrm{4517}}^1$

素因数の和:4589

約数の個数: 24

約数和(自身を含む): 33613920

約数和(自身を除く): 13626195

約数列:

[1, 3, 5, 15, 25, 59, 75, 177, 295, 885, 1475, 4425, 4517, 13551, 22585, 67755, 112925, 266503, 338775, 799509, 1332515, 3997545, 6662575, 19987725]

約数ペア:

[(1, 19987725), (3, 6662575), (5, 3997545), (15, 1332515), (25, 799509), (59, 338775), (75, 266503), (177, 112925), (295, 67755), (885, 22585), (1475, 13551), (4425, 4517)]