28809781

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{1693}}^1$

素因数の和:1741

約数の個数: 32

約数和(自身を含む): 40981248

約数和(自身を除く): 12171467

約数列:

[1, 7, 11, 13, 17, 77, 91, 119, 143, 187, 221, 1001, 1309, 1547, 1693, 2431, 11851, 17017, 18623, 22009, 28781, 130361, 154063, 201467, 242099, 316591, 374153, 1694693, 2216137, 2619071, 4115683, 28809781]

約数ペア:

[(1, 28809781), (7, 4115683), (11, 2619071), (13, 2216137), (17, 1694693), (77, 374153), (91, 316591), (119, 242099), (143, 201467), (187, 154063), (221, 130361), (1001, 28781), (1309, 22009), (1547, 18623), (1693, 17017), (2431, 11851)]