20398905

素因数分解:

$3^3\times 5^1\times {\mathrm{53}}^1\times {\mathrm{2851}}^1$

素因数の和:2918

約数の個数: 32

約数和(自身を含む): 36961920

約数和(自身を除く): 16563015

約数列:

[1, 3, 5, 9, 15, 27, 45, 53, 135, 159, 265, 477, 795, 1431, 2385, 2851, 7155, 8553, 14255, 25659, 42765, 76977, 128295, 151103, 384885, 453309, 755515, 1359927, 2266545, 4079781, 6799635, 20398905]

約数ペア:

[(1, 20398905), (3, 6799635), (5, 4079781), (9, 2266545), (15, 1359927), (27, 755515), (45, 453309), (53, 384885), (135, 151103), (159, 128295), (265, 76977), (477, 42765), (795, 25659), (1431, 14255), (2385, 8553), (2851, 7155)]