20834840

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{103}}^1\times {\mathrm{389}}^1$

素因数の和:516

約数の個数: 64

約数和(自身を含む): 51105600

約数和(自身を除く): 30270760

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 103, 104, 130, 206, 260, 389, 412, 515, 520, 778, 824, 1030, 1339, 1556, 1945, 2060, 2678, 3112, 3890, 4120, 5057, 5356, 6695, 7780, 10114, 10712, 13390, 15560, 20228, 25285, 26780, 40067, 40456, 50570, 53560, 80134, 101140, 160268, 200335, 202280, 320536, 400670, 520871, 801340, 1041742, 1602680, 2083484, 2604355, 4166968, 5208710, 10417420, 20834840]

約数ペア:

[(1, 20834840), (2, 10417420), (4, 5208710), (5, 4166968), (8, 2604355), (10, 2083484), (13, 1602680), (20, 1041742), (26, 801340), (40, 520871), (52, 400670), (65, 320536), (103, 202280), (104, 200335), (130, 160268), (206, 101140), (260, 80134), (389, 53560), (412, 50570), (515, 40456), (520, 40067), (778, 26780), (824, 25285), (1030, 20228), (1339, 15560), (1556, 13390), (1945, 10712), (2060, 10114), (2678, 7780), (3112, 6695), (3890, 5356), (4120, 5057)]