20667080

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{2381}}^1$

素因数の和:2430

約数の個数: 64

約数和(自身を含む): 54881280

約数和(自身を除く): 34214200

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 31, 35, 40, 56, 62, 70, 124, 140, 155, 217, 248, 280, 310, 434, 620, 868, 1085, 1240, 1736, 2170, 2381, 4340, 4762, 8680, 9524, 11905, 16667, 19048, 23810, 33334, 47620, 66668, 73811, 83335, 95240, 133336, 147622, 166670, 295244, 333340, 369055, 516677, 590488, 666680, 738110, 1033354, 1476220, 2066708, 2583385, 2952440, 4133416, 5166770, 10333540, 20667080]

約数ペア:

[(1, 20667080), (2, 10333540), (4, 5166770), (5, 4133416), (7, 2952440), (8, 2583385), (10, 2066708), (14, 1476220), (20, 1033354), (28, 738110), (31, 666680), (35, 590488), (40, 516677), (56, 369055), (62, 333340), (70, 295244), (124, 166670), (140, 147622), (155, 133336), (217, 95240), (248, 83335), (280, 73811), (310, 66668), (434, 47620), (620, 33334), (868, 23810), (1085, 19048), (1240, 16667), (1736, 11905), (2170, 9524), (2381, 8680), (4340, 4762)]