20854120

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{1049}}^1$

素因数の和:1138

約数の個数: 64

約数和(自身を含む): 54432000

約数和(自身を除く): 33577880

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 71, 140, 142, 280, 284, 355, 497, 568, 710, 994, 1049, 1420, 1988, 2098, 2485, 2840, 3976, 4196, 4970, 5245, 7343, 8392, 9940, 10490, 14686, 19880, 20980, 29372, 36715, 41960, 58744, 73430, 74479, 146860, 148958, 293720, 297916, 372395, 521353, 595832, 744790, 1042706, 1489580, 2085412, 2606765, 2979160, 4170824, 5213530, 10427060, 20854120]

約数ペア:

[(1, 20854120), (2, 10427060), (4, 5213530), (5, 4170824), (7, 2979160), (8, 2606765), (10, 2085412), (14, 1489580), (20, 1042706), (28, 744790), (35, 595832), (40, 521353), (56, 372395), (70, 297916), (71, 293720), (140, 148958), (142, 146860), (280, 74479), (284, 73430), (355, 58744), (497, 41960), (568, 36715), (710, 29372), (994, 20980), (1049, 19880), (1420, 14686), (1988, 10490), (2098, 9940), (2485, 8392), (2840, 7343), (3976, 5245), (4196, 4970)]