20478129

素因数分解:

$3^1\times 7^4\times {\mathrm{2843}}^1$

素因数の和:2874

約数の個数: 20

約数和(自身を含む): 31864176

約数和(自身を除く): 11386047

約数列:

[1, 3, 7, 21, 49, 147, 343, 1029, 2401, 2843, 7203, 8529, 19901, 59703, 139307, 417921, 975149, 2925447, 6826043, 20478129]

約数ペア:

[(1, 20478129), (3, 6826043), (7, 2925447), (21, 975149), (49, 417921), (147, 139307), (343, 59703), (1029, 19901), (2401, 8529), (2843, 7203)]