81400545

素因数分解:

$3^4\times 5^1\times {\mathrm{200989}}^1$

素因数の和:201006

約数の個数: 20

約数和(自身を含む): 145918740

約数和(自身を除く): 64518195

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 200989, 602967, 1004945, 1808901, 3014835, 5426703, 9044505, 16280109, 27133515, 81400545]

約数ペア:

[(1, 81400545), (3, 27133515), (5, 16280109), (9, 9044505), (15, 5426703), (27, 3014835), (45, 1808901), (81, 1004945), (135, 602967), (405, 200989)]