19814680

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{6977}}^1$

素因数の和:7059

約数の個数: 32

約数和(自身を含む): 45217440

約数和(自身を除く): 25402760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 142, 284, 355, 568, 710, 1420, 2840, 6977, 13954, 27908, 34885, 55816, 69770, 139540, 279080, 495367, 990734, 1981468, 2476835, 3962936, 4953670, 9907340, 19814680]

約数ペア:

[(1, 19814680), (2, 9907340), (4, 4953670), (5, 3962936), (8, 2476835), (10, 1981468), (20, 990734), (40, 495367), (71, 279080), (142, 139540), (284, 69770), (355, 55816), (568, 34885), (710, 27908), (1420, 13954), (2840, 6977)]