20496280

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{1031}}^1$

素因数の和:1120

約数の個数: 64

約数和(自身を含む): 53498880

約数和(自身を除く): 33002600

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, 1031, 1420, 1988, 2062, 2485, 2840, 3976, 4124, 4970, 5155, 7217, 8248, 9940, 10310, 14434, 19880, 20620, 28868, 36085, 41240, 57736, 72170, 73201, 144340, 146402, 288680, 292804, 366005, 512407, 585608, 732010, 1024814, 1464020, 2049628, 2562035, 2928040, 4099256, 5124070, 10248140, 20496280]

約数ペア:

[(1, 20496280), (2, 10248140), (4, 5124070), (5, 4099256), (7, 2928040), (8, 2562035), (10, 2049628), (14, 1464020), (20, 1024814), (28, 732010), (35, 585608), (40, 512407), (56, 366005), (70, 292804), (71, 288680), (140, 146402), (142, 144340), (280, 73201), (284, 72170), (355, 57736), (497, 41240), (568, 36085), (710, 28868), (994, 20620), (1031, 19880), (1420, 14434), (1988, 10310), (2062, 9940), (2485, 8248), (2840, 7217), (3976, 5155), (4124, 4970)]