21789418

素因数分解:

$2^1\times 7^3\times {\mathrm{23}}^1\times {\mathrm{1381}}^1$

素因数の和:1427

約数の個数: 32

約数和(自身を含む): 39801600

約数和(自身を除く): 18012182

約数列:

[1, 2, 7, 14, 23, 46, 49, 98, 161, 322, 343, 686, 1127, 1381, 2254, 2762, 7889, 9667, 15778, 19334, 31763, 63526, 67669, 135338, 222341, 444682, 473683, 947366, 1556387, 3112774, 10894709, 21789418]

約数ペア:

[(1, 21789418), (2, 10894709), (7, 3112774), (14, 1556387), (23, 947366), (46, 473683), (49, 444682), (98, 222341), (161, 135338), (322, 67669), (343, 63526), (686, 31763), (1127, 19334), (1381, 15778), (2254, 9667), (2762, 7889)]