20825007

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^2\times {\mathrm{41}}^1\times {\mathrm{67}}^1$

素因数の和:156

約数の個数: 48

約数和(自身を含む): 34820352

約数和(自身を除く): 13995345

約数列:

[1, 3, 7, 19, 21, 41, 57, 67, 123, 133, 201, 287, 361, 399, 469, 779, 861, 1083, 1273, 1407, 2337, 2527, 2747, 3819, 5453, 7581, 8241, 8911, 14801, 16359, 19229, 24187, 26733, 44403, 52193, 57687, 72561, 103607, 156579, 169309, 310821, 365351, 507927, 991667, 1096053, 2975001, 6941669, 20825007]

約数ペア:

[(1, 20825007), (3, 6941669), (7, 2975001), (19, 1096053), (21, 991667), (41, 507927), (57, 365351), (67, 310821), (123, 169309), (133, 156579), (201, 103607), (287, 72561), (361, 57687), (399, 52193), (469, 44403), (779, 26733), (861, 24187), (1083, 19229), (1273, 16359), (1407, 14801), (2337, 8911), (2527, 8241), (2747, 7581), (3819, 5453)]