651080

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{397}}^1$

素因数の和:449

約数の個数: 32

約数和(自身を含む): 1504440

約数和(自身を除く): 853360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 397, 410, 794, 820, 1588, 1640, 1985, 3176, 3970, 7940, 15880, 16277, 32554, 65108, 81385, 130216, 162770, 325540, 651080]

約数ペア:

[(1, 651080), (2, 325540), (4, 162770), (5, 130216), (8, 81385), (10, 65108), (20, 32554), (40, 16277), (41, 15880), (82, 7940), (164, 3970), (205, 3176), (328, 1985), (397, 1640), (410, 1588), (794, 820)]