81901809

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{101}}^1\times {\mathrm{8191}}^1$

素因数の和:8309

約数の個数: 24

約数和(自身を含む): 130351104

約数和(自身を除く): 48449295

約数列:

[1, 3, 9, 11, 33, 99, 101, 303, 909, 1111, 3333, 8191, 9999, 24573, 73719, 90101, 270303, 810909, 827291, 2481873, 7445619, 9100201, 27300603, 81901809]

約数ペア:

[(1, 81901809), (3, 27300603), (9, 9100201), (11, 7445619), (33, 2481873), (99, 827291), (101, 810909), (303, 270303), (909, 90101), (1111, 73719), (3333, 24573), (8191, 9999)]