399124257

素因数分解:

$3^1\times 7^2\times {\mathrm{151}}^1\times {\mathrm{17981}}^1$

素因数の和:18149

約数の個数: 24

約数和(自身を含む): 623184192

約数和(自身を除く): 224059935

約数列:

[1, 3, 7, 21, 49, 147, 151, 453, 1057, 3171, 7399, 17981, 22197, 53943, 125867, 377601, 881069, 2643207, 2715131, 8145393, 19005917, 57017751, 133041419, 399124257]

約数ペア:

[(1, 399124257), (3, 133041419), (7, 57017751), (21, 19005917), (49, 8145393), (147, 2715131), (151, 2643207), (453, 881069), (1057, 377601), (3171, 125867), (7399, 53943), (17981, 22197)]