990794870

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{149}}^1\times {\mathrm{51151}}^1$

素因数の和:51320

約数の個数: 32

約数和(自身を含む): 1933545600

約数和(自身を除く): 942750730

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 149, 298, 745, 1490, 1937, 3874, 9685, 19370, 51151, 102302, 255755, 511510, 664963, 1329926, 3324815, 6649630, 7621499, 15242998, 38107495, 76214990, 99079487, 198158974, 495397435, 990794870]

約数ペア:

[(1, 990794870), (2, 495397435), (5, 198158974), (10, 99079487), (13, 76214990), (26, 38107495), (65, 15242998), (130, 7621499), (149, 6649630), (298, 3324815), (745, 1329926), (1490, 664963), (1937, 511510), (3874, 255755), (9685, 102302), (19370, 51151)]