21120323

素因数分解:

$7^2\times {\mathrm{29}}^1\times {\mathrm{89}}^1\times {\mathrm{167}}^1$

素因数の和:299

約数の個数: 24

約数和(自身を含む): 25855200

約数和(自身を除く): 4734877

約数列:

[1, 7, 29, 49, 89, 167, 203, 623, 1169, 1421, 2581, 4361, 4843, 8183, 14863, 18067, 33901, 104041, 126469, 237307, 431027, 728287, 3017189, 21120323]

約数ペア:

[(1, 21120323), (7, 3017189), (29, 728287), (49, 431027), (89, 237307), (167, 126469), (203, 104041), (623, 33901), (1169, 18067), (1421, 14863), (2581, 8183), (4361, 4843)]