19799925

素因数分解:

$3^1\times 5^2\times {\mathrm{41}}^1\times {\mathrm{47}}^1\times {\mathrm{137}}^1$

素因数の和:238

約数の個数: 48

約数和(自身を含む): 34497792

約数和(自身を除く): 14697867

約数列:

[1, 3, 5, 15, 25, 41, 47, 75, 123, 137, 141, 205, 235, 411, 615, 685, 705, 1025, 1175, 1927, 2055, 3075, 3425, 3525, 5617, 5781, 6439, 9635, 10275, 16851, 19317, 28085, 28905, 32195, 48175, 84255, 96585, 140425, 144525, 160975, 263999, 421275, 482925, 791997, 1319995, 3959985, 6599975, 19799925]

約数ペア:

[(1, 19799925), (3, 6599975), (5, 3959985), (15, 1319995), (25, 791997), (41, 482925), (47, 421275), (75, 263999), (123, 160975), (137, 144525), (141, 140425), (205, 96585), (235, 84255), (411, 48175), (615, 32195), (685, 28905), (705, 28085), (1025, 19317), (1175, 16851), (1927, 10275), (2055, 9635), (3075, 6439), (3425, 5781), (3525, 5617)]