1640990

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{971}}^1$

素因数の和:1004

約数の個数: 24

約数和(自身を含む): 3201768

約数和(自身を除く): 1560778

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 169, 338, 845, 971, 1690, 1942, 4855, 9710, 12623, 25246, 63115, 126230, 164099, 328198, 820495, 1640990]

約数ペア:

[(1, 1640990), (2, 820495), (5, 328198), (10, 164099), (13, 126230), (26, 63115), (65, 25246), (130, 12623), (169, 9710), (338, 4855), (845, 1942), (971, 1690)]