18979990

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{97}}^1\times {\mathrm{1151}}^1$

素因数の和:1272

約数の個数: 32

約数和(自身を含む): 36578304

約数和(自身を除く): 17598314

約数列:

[1, 2, 5, 10, 17, 34, 85, 97, 170, 194, 485, 970, 1151, 1649, 2302, 3298, 5755, 8245, 11510, 16490, 19567, 39134, 97835, 111647, 195670, 223294, 558235, 1116470, 1897999, 3795998, 9489995, 18979990]

約数ペア:

[(1, 18979990), (2, 9489995), (5, 3795998), (10, 1897999), (17, 1116470), (34, 558235), (85, 223294), (97, 195670), (170, 111647), (194, 97835), (485, 39134), (970, 19567), (1151, 16490), (1649, 11510), (2302, 8245), (3298, 5755)]