18661790

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{29}}^2\times {\mathrm{317}}^1$

素因数の和:389

約数の個数: 48

約数和(自身を含む): 39884832

約数和(自身を除く): 21223042

約数列:

[1, 2, 5, 7, 10, 14, 29, 35, 58, 70, 145, 203, 290, 317, 406, 634, 841, 1015, 1585, 1682, 2030, 2219, 3170, 4205, 4438, 5887, 8410, 9193, 11095, 11774, 18386, 22190, 29435, 45965, 58870, 64351, 91930, 128702, 266597, 321755, 533194, 643510, 1332985, 1866179, 2665970, 3732358, 9330895, 18661790]

約数ペア:

[(1, 18661790), (2, 9330895), (5, 3732358), (7, 2665970), (10, 1866179), (14, 1332985), (29, 643510), (35, 533194), (58, 321755), (70, 266597), (145, 128702), (203, 91930), (290, 64351), (317, 58870), (406, 45965), (634, 29435), (841, 22190), (1015, 18386), (1585, 11774), (1682, 11095), (2030, 9193), (2219, 8410), (3170, 5887), (4205, 4438)]