81985281

素因数分解:

$3^1\times 7^2\times {\mathrm{41}}^1\times {\mathrm{61}}^1\times {\mathrm{223}}^1$

素因数の和:342

約数の個数: 48

約数和(自身を含む): 132991488

約数和(自身を除く): 51006207

約数列:

[1, 3, 7, 21, 41, 49, 61, 123, 147, 183, 223, 287, 427, 669, 861, 1281, 1561, 2009, 2501, 2989, 4683, 6027, 7503, 8967, 9143, 10927, 13603, 17507, 27429, 32781, 40809, 52521, 64001, 95221, 122549, 192003, 285663, 367647, 448007, 557723, 666547, 1344021, 1673169, 1999641, 3904061, 11712183, 27328427, 81985281]

約数ペア:

[(1, 81985281), (3, 27328427), (7, 11712183), (21, 3904061), (41, 1999641), (49, 1673169), (61, 1344021), (123, 666547), (147, 557723), (183, 448007), (223, 367647), (287, 285663), (427, 192003), (669, 122549), (861, 95221), (1281, 64001), (1561, 52521), (2009, 40809), (2501, 32781), (2989, 27429), (4683, 17507), (6027, 13603), (7503, 10927), (8967, 9143)]