20559975

素因数分解:

$3^1\times 5^2\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{239}}^1$

素因数の和:320

約数の個数: 48

約数和(自身を含む): 36188160

約数和(自身を除く): 15628185

約数列:

[1, 3, 5, 15, 25, 31, 37, 75, 93, 111, 155, 185, 239, 465, 555, 717, 775, 925, 1147, 1195, 2325, 2775, 3441, 3585, 5735, 5975, 7409, 8843, 17205, 17925, 22227, 26529, 28675, 37045, 44215, 86025, 111135, 132645, 185225, 221075, 274133, 555675, 663225, 822399, 1370665, 4111995, 6853325, 20559975]

約数ペア:

[(1, 20559975), (3, 6853325), (5, 4111995), (15, 1370665), (25, 822399), (31, 663225), (37, 555675), (75, 274133), (93, 221075), (111, 185225), (155, 132645), (185, 111135), (239, 86025), (465, 44215), (555, 37045), (717, 28675), (775, 26529), (925, 22227), (1147, 17925), (1195, 17205), (2325, 8843), (2775, 7409), (3441, 5975), (3585, 5735)]