20889999

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{2927}}^1$

素因数の和:3007

約数の個数: 24

約数和(自身を含む): 33039552

約数和(自身を除く): 12149553

約数列:

[1, 3, 9, 13, 39, 61, 117, 183, 549, 793, 2379, 2927, 7137, 8781, 26343, 38051, 114153, 178547, 342459, 535641, 1606923, 2321111, 6963333, 20889999]

約数ペア:

[(1, 20889999), (3, 6963333), (9, 2321111), (13, 1606923), (39, 535641), (61, 342459), (117, 178547), (183, 114153), (549, 38051), (793, 26343), (2379, 8781), (2927, 7137)]