21690237

素因数分解:

$3^1\times {\mathrm{109}}^1\times {\mathrm{113}}^1\times {\mathrm{587}}^1$

素因数の和:812

約数の個数: 16

約数和(自身を含む): 29494080

約数和(自身を除く): 7803843

約数列:

[1, 3, 109, 113, 327, 339, 587, 1761, 12317, 36951, 63983, 66331, 191949, 198993, 7230079, 21690237]

約数ペア:

[(1, 21690237), (3, 7230079), (109, 198993), (113, 191949), (327, 66331), (339, 63983), (587, 36951), (1761, 12317)]