20987386

素因数分解:

$2^1\times 7^2\times {\mathrm{331}}^1\times {\mathrm{647}}^1$

素因数の和:994

約数の個数: 24

約数和(自身を含む): 36788256

約数和(自身を除く): 15800870

約数列:

[1, 2, 7, 14, 49, 98, 331, 647, 662, 1294, 2317, 4529, 4634, 9058, 16219, 31703, 32438, 63406, 214157, 428314, 1499099, 2998198, 10493693, 20987386]

約数ペア:

[(1, 20987386), (2, 10493693), (7, 2998198), (14, 1499099), (49, 428314), (98, 214157), (331, 63406), (647, 32438), (662, 31703), (1294, 16219), (2317, 9058), (4529, 4634)]