20665407

素因数分解:

$3^1\times 7^4\times {\mathrm{19}}^1\times {\mathrm{151}}^1$

素因数の和:201

約数の個数: 40

約数和(自身を含む): 34060160

約数和(自身を除く): 13394753

約数列:

[1, 3, 7, 19, 21, 49, 57, 133, 147, 151, 343, 399, 453, 931, 1029, 1057, 2401, 2793, 2869, 3171, 6517, 7203, 7399, 8607, 19551, 20083, 22197, 45619, 51793, 60249, 136857, 140581, 155379, 362551, 421743, 984067, 1087653, 2952201, 6888469, 20665407]

約数ペア:

[(1, 20665407), (3, 6888469), (7, 2952201), (19, 1087653), (21, 984067), (49, 421743), (57, 362551), (133, 155379), (147, 140581), (151, 136857), (343, 60249), (399, 51793), (453, 45619), (931, 22197), (1029, 20083), (1057, 19551), (2401, 8607), (2793, 7399), (2869, 7203), (3171, 6517)]