19881260

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{20287}}^1$

素因数の和:20310

約数の個数: 36

約数和(自身を含む): 48569472

約数和(自身を除く): 28688212

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 980, 20287, 40574, 81148, 101435, 142009, 202870, 284018, 405740, 568036, 710045, 994063, 1420090, 1988126, 2840180, 3976252, 4970315, 9940630, 19881260]

約数ペア:

[(1, 19881260), (2, 9940630), (4, 4970315), (5, 3976252), (7, 2840180), (10, 1988126), (14, 1420090), (20, 994063), (28, 710045), (35, 568036), (49, 405740), (70, 284018), (98, 202870), (140, 142009), (196, 101435), (245, 81148), (490, 40574), (980, 20287)]