21245075

素因数分解:

$5^2\times {\mathrm{31}}^1\times {\mathrm{79}}^1\times {\mathrm{347}}^1$

素因数の和:467

約数の個数: 24

約数和(自身を含む): 27617280

約数和(自身を除く): 6372205

約数列:

[1, 5, 25, 31, 79, 155, 347, 395, 775, 1735, 1975, 2449, 8675, 10757, 12245, 27413, 53785, 61225, 137065, 268925, 685325, 849803, 4249015, 21245075]

約数ペア:

[(1, 21245075), (5, 4249015), (25, 849803), (31, 685325), (79, 268925), (155, 137065), (347, 61225), (395, 53785), (775, 27413), (1735, 12245), (1975, 10757), (2449, 8675)]