39978680

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{2011}}^1$

素因数の和:2100

約数の個数: 64

約数和(自身を含む): 104302080

約数和(自身を除く): 64323400

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, 1420, 1988, 2011, 2485, 2840, 3976, 4022, 4970, 8044, 9940, 10055, 14077, 16088, 19880, 20110, 28154, 40220, 56308, 70385, 80440, 112616, 140770, 142781, 281540, 285562, 563080, 571124, 713905, 999467, 1142248, 1427810, 1998934, 2855620, 3997868, 4997335, 5711240, 7995736, 9994670, 19989340, 39978680]

約数ペア:

[(1, 39978680), (2, 19989340), (4, 9994670), (5, 7995736), (7, 5711240), (8, 4997335), (10, 3997868), (14, 2855620), (20, 1998934), (28, 1427810), (35, 1142248), (40, 999467), (56, 713905), (70, 571124), (71, 563080), (140, 285562), (142, 281540), (280, 142781), (284, 140770), (355, 112616), (497, 80440), (568, 70385), (710, 56308), (994, 40220), (1420, 28154), (1988, 20110), (2011, 19880), (2485, 16088), (2840, 14077), (3976, 10055), (4022, 9940), (4970, 8044)]