19518818

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{47}}^1\times {\mathrm{439}}^1$

素因数の和:542

約数の個数: 32

約数和(自身を含む): 33454080

約数和(自身を除く): 13935262

約数列:

[1, 2, 11, 22, 43, 47, 86, 94, 439, 473, 517, 878, 946, 1034, 2021, 4042, 4829, 9658, 18877, 20633, 22231, 37754, 41266, 44462, 207647, 226963, 415294, 453926, 887219, 1774438, 9759409, 19518818]

約数ペア:

[(1, 19518818), (2, 9759409), (11, 1774438), (22, 887219), (43, 453926), (47, 415294), (86, 226963), (94, 207647), (439, 44462), (473, 41266), (517, 37754), (878, 22231), (946, 20633), (1034, 18877), (2021, 9658), (4042, 4829)]