20663908

素因数分解:

$2^2\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{191}}^1$

素因数の和:292

約数の個数: 48

約数和(自身を含む): 40449024

約数和(自身を除く): 19785116

約数列:

[1, 2, 4, 17, 34, 37, 43, 68, 74, 86, 148, 172, 191, 382, 629, 731, 764, 1258, 1462, 1591, 2516, 2924, 3182, 3247, 6364, 6494, 7067, 8213, 12988, 14134, 16426, 27047, 28268, 32852, 54094, 108188, 120139, 139621, 240278, 279242, 303881, 480556, 558484, 607762, 1215524, 5165977, 10331954, 20663908]

約数ペア:

[(1, 20663908), (2, 10331954), (4, 5165977), (17, 1215524), (34, 607762), (37, 558484), (43, 480556), (68, 303881), (74, 279242), (86, 240278), (148, 139621), (172, 120139), (191, 108188), (382, 54094), (629, 32852), (731, 28268), (764, 27047), (1258, 16426), (1462, 14134), (1591, 12988), (2516, 8213), (2924, 7067), (3182, 6494), (3247, 6364)]