21000212

素因数分解:

$2^2\times {\mathrm{67}}^1\times {\mathrm{127}}^1\times {\mathrm{617}}^1$

素因数の和:815

約数の個数: 24

約数和(自身を含む): 37653504

約数和(自身を除く): 16653292

約数列:

[1, 2, 4, 67, 127, 134, 254, 268, 508, 617, 1234, 2468, 8509, 17018, 34036, 41339, 78359, 82678, 156718, 165356, 313436, 5250053, 10500106, 21000212]

約数ペア:

[(1, 21000212), (2, 10500106), (4, 5250053), (67, 313436), (127, 165356), (134, 156718), (254, 82678), (268, 78359), (508, 41339), (617, 34036), (1234, 17018), (2468, 8509)]