17820790

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^2\times {\mathrm{163}}^1$

素因数の和:241

約数の個数: 48

約数和(自身を含む): 35996688

約数和(自身を除く): 18175898

約数列:

[1, 2, 5, 10, 13, 26, 29, 58, 65, 130, 145, 163, 290, 326, 377, 754, 815, 841, 1630, 1682, 1885, 2119, 3770, 4205, 4238, 4727, 8410, 9454, 10595, 10933, 21190, 21866, 23635, 47270, 54665, 61451, 109330, 122902, 137083, 274166, 307255, 614510, 685415, 1370830, 1782079, 3564158, 8910395, 17820790]

約数ペア:

[(1, 17820790), (2, 8910395), (5, 3564158), (10, 1782079), (13, 1370830), (26, 685415), (29, 614510), (58, 307255), (65, 274166), (130, 137083), (145, 122902), (163, 109330), (290, 61451), (326, 54665), (377, 47270), (754, 23635), (815, 21866), (841, 21190), (1630, 10933), (1682, 10595), (1885, 9454), (2119, 8410), (3770, 4727), (4205, 4238)]