21904778

素因数分解:

$2^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{22037}}^1$

素因数の和:22117

約数の個数: 16

約数和(自身を含む): 38081664

約数和(自身を除く): 16176886

約数列:

[1, 2, 7, 14, 71, 142, 497, 994, 22037, 44074, 154259, 308518, 1564627, 3129254, 10952389, 21904778]

約数ペア:

[(1, 21904778), (2, 10952389), (7, 3129254), (14, 1564627), (71, 308518), (142, 154259), (497, 44074), (994, 22037)]