21701421

素因数分解:

$3^2\times 7^1\times {\mathrm{61}}^1\times {\mathrm{5647}}^1$

素因数の和:5721

約数の個数: 24

約数和(自身を含む): 36418304

約数和(自身を除く): 14716883

約数列:

[1, 3, 7, 9, 21, 61, 63, 183, 427, 549, 1281, 3843, 5647, 16941, 39529, 50823, 118587, 344467, 355761, 1033401, 2411269, 3100203, 7233807, 21701421]

約数ペア:

[(1, 21701421), (3, 7233807), (7, 3100203), (9, 2411269), (21, 1033401), (61, 355761), (63, 344467), (183, 118587), (427, 50823), (549, 39529), (1281, 16941), (3843, 5647)]