31502840

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{12911}}^1$

素因数の和:12983

約数の個数: 32

約数和(自身を含む): 72048960

約数和(自身を除く): 40546120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 244, 305, 488, 610, 1220, 2440, 12911, 25822, 51644, 64555, 103288, 129110, 258220, 516440, 787571, 1575142, 3150284, 3937855, 6300568, 7875710, 15751420, 31502840]

約数ペア:

[(1, 31502840), (2, 15751420), (4, 7875710), (5, 6300568), (8, 3937855), (10, 3150284), (20, 1575142), (40, 787571), (61, 516440), (122, 258220), (244, 129110), (305, 103288), (488, 64555), (610, 51644), (1220, 25822), (2440, 12911)]