21981921

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{109}}^1\times {\mathrm{5171}}^1$

素因数の和:5296

約数の個数: 16

約数和(自身を含む): 31859520

約数和(自身を除く): 9877599

約数列:

[1, 3, 13, 39, 109, 327, 1417, 4251, 5171, 15513, 67223, 201669, 563639, 1690917, 7327307, 21981921]

約数ペア:

[(1, 21981921), (3, 7327307), (13, 1690917), (39, 563639), (109, 201669), (327, 67223), (1417, 15513), (4251, 5171)]