18681978

素因数分解:

$2^1\times 3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{571}}^1$

素因数の和:643

約数の個数: 64

約数和(自身を含む): 46126080

約数和(自身を除く): 27444102

約数列:

[1, 2, 3, 6, 7, 14, 19, 21, 38, 41, 42, 57, 82, 114, 123, 133, 246, 266, 287, 399, 571, 574, 779, 798, 861, 1142, 1558, 1713, 1722, 2337, 3426, 3997, 4674, 5453, 7994, 10849, 10906, 11991, 16359, 21698, 23411, 23982, 32547, 32718, 46822, 65094, 70233, 75943, 140466, 151886, 163877, 227829, 327754, 444809, 455658, 491631, 889618, 983262, 1334427, 2668854, 3113663, 6227326, 9340989, 18681978]

約数ペア:

[(1, 18681978), (2, 9340989), (3, 6227326), (6, 3113663), (7, 2668854), (14, 1334427), (19, 983262), (21, 889618), (38, 491631), (41, 455658), (42, 444809), (57, 327754), (82, 227829), (114, 163877), (123, 151886), (133, 140466), (246, 75943), (266, 70233), (287, 65094), (399, 46822), (571, 32718), (574, 32547), (779, 23982), (798, 23411), (861, 21698), (1142, 16359), (1558, 11991), (1713, 10906), (1722, 10849), (2337, 7994), (3426, 5453), (3997, 4674)]