81861409

素因数分解:

$7^3\times {\mathrm{17}}^1\times {\mathrm{101}}^1\times {\mathrm{139}}^1$

素因数の和:278

約数の個数: 32

約数和(自身を含む): 102816000

約数和(自身を除く): 20954591

約数列:

[1, 7, 17, 49, 101, 119, 139, 343, 707, 833, 973, 1717, 2363, 4949, 5831, 6811, 12019, 14039, 16541, 34643, 47677, 84133, 98273, 115787, 238663, 588931, 687911, 810509, 1670641, 4815377, 11694487, 81861409]

約数ペア:

[(1, 81861409), (7, 11694487), (17, 4815377), (49, 1670641), (101, 810509), (119, 687911), (139, 588931), (343, 238663), (707, 115787), (833, 98273), (973, 84133), (1717, 47677), (2363, 34643), (4949, 16541), (5831, 14039), (6811, 12019)]