21981603

素因数分解:

$3^1\times 7^1\times {\mathrm{503}}^1\times {\mathrm{2081}}^1$

素因数の和:2594

約数の個数: 16

約数和(自身を含む): 33578496

約数和(自身を除く): 11596893

約数列:

[1, 3, 7, 21, 503, 1509, 2081, 3521, 6243, 10563, 14567, 43701, 1046743, 3140229, 7327201, 21981603]

約数ペア:

[(1, 21981603), (3, 7327201), (7, 3140229), (21, 1046743), (503, 43701), (1509, 14567), (2081, 10563), (3521, 6243)]