648838840

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{1247767}}^1$

素因数の和:1247791

約数の個数: 32

約数和(自身を含む): 1572187680

約数和(自身を除く): 923348840

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 1247767, 2495534, 4991068, 6238835, 9982136, 12477670, 16220971, 24955340, 32441942, 49910680, 64883884, 81104855, 129767768, 162209710, 324419420, 648838840]

約数ペア:

[(1, 648838840), (2, 324419420), (4, 162209710), (5, 129767768), (8, 81104855), (10, 64883884), (13, 49910680), (20, 32441942), (26, 24955340), (40, 16220971), (52, 12477670), (65, 9982136), (104, 6238835), (130, 4991068), (260, 2495534), (520, 1247767)]