21287870

素因数分解:

$2^1\times 5^1\times {\mathrm{797}}^1\times {\mathrm{2671}}^1$

素因数の和:3475

約数の個数: 16

約数和(自身を含む): 38380608

約数和(自身を除く): 17092738

約数列:

[1, 2, 5, 10, 797, 1594, 2671, 3985, 5342, 7970, 13355, 26710, 2128787, 4257574, 10643935, 21287870]

約数ペア:

[(1, 21287870), (2, 10643935), (5, 4257574), (10, 2128787), (797, 26710), (1594, 13355), (2671, 7970), (3985, 5342)]