21378032

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{1301}}^1$

素因数の和:1401

約数の個数: 40

約数和(自身を含む): 45205440

約数和(自身を除く): 23827408

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 79, 104, 158, 208, 316, 632, 1027, 1264, 1301, 2054, 2602, 4108, 5204, 8216, 10408, 16432, 16913, 20816, 33826, 67652, 102779, 135304, 205558, 270608, 411116, 822232, 1336127, 1644464, 2672254, 5344508, 10689016, 21378032]

約数ペア:

[(1, 21378032), (2, 10689016), (4, 5344508), (8, 2672254), (13, 1644464), (16, 1336127), (26, 822232), (52, 411116), (79, 270608), (104, 205558), (158, 135304), (208, 102779), (316, 67652), (632, 33826), (1027, 20816), (1264, 16913), (1301, 16432), (2054, 10408), (2602, 8216), (4108, 5204)]