20683960

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{1621}}^1$

素因数の和:1672

約数の個数: 64

約数和(自身を含む): 52552800

約数和(自身を除く): 31868840

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 29, 40, 44, 55, 58, 88, 110, 116, 145, 220, 232, 290, 319, 440, 580, 638, 1160, 1276, 1595, 1621, 2552, 3190, 3242, 6380, 6484, 8105, 12760, 12968, 16210, 17831, 32420, 35662, 47009, 64840, 71324, 89155, 94018, 142648, 178310, 188036, 235045, 356620, 376072, 470090, 517099, 713240, 940180, 1034198, 1880360, 2068396, 2585495, 4136792, 5170990, 10341980, 20683960]

約数ペア:

[(1, 20683960), (2, 10341980), (4, 5170990), (5, 4136792), (8, 2585495), (10, 2068396), (11, 1880360), (20, 1034198), (22, 940180), (29, 713240), (40, 517099), (44, 470090), (55, 376072), (58, 356620), (88, 235045), (110, 188036), (116, 178310), (145, 142648), (220, 94018), (232, 89155), (290, 71324), (319, 64840), (440, 47009), (580, 35662), (638, 32420), (1160, 17831), (1276, 16210), (1595, 12968), (1621, 12760), (2552, 8105), (3190, 6484), (3242, 6380)]