20970990

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{389}}^1\times {\mathrm{599}}^1$

素因数の和:1001

約数の個数: 48

約数和(自身を含む): 54756000

約数和(自身を除く): 33785010

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90, 389, 599, 778, 1167, 1198, 1797, 1945, 2334, 2995, 3501, 3594, 3890, 5391, 5835, 5990, 7002, 8985, 10782, 11670, 17505, 17970, 26955, 35010, 53910, 233011, 466022, 699033, 1165055, 1398066, 2097099, 2330110, 3495165, 4194198, 6990330, 10485495, 20970990]

約数ペア:

[(1, 20970990), (2, 10485495), (3, 6990330), (5, 4194198), (6, 3495165), (9, 2330110), (10, 2097099), (15, 1398066), (18, 1165055), (30, 699033), (45, 466022), (90, 233011), (389, 53910), (599, 35010), (778, 26955), (1167, 17970), (1198, 17505), (1797, 11670), (1945, 10782), (2334, 8985), (2995, 7002), (3501, 5990), (3594, 5835), (3890, 5391)]