78828020

素因数分解:

$2^2\times 5^1\times {\mathrm{97}}^1\times {\mathrm{179}}^1\times {\mathrm{227}}^1$

素因数の和:512

約数の個数: 48

約数和(自身を含む): 168920640

約数和(自身を除く): 90092620

約数列:

[1, 2, 4, 5, 10, 20, 97, 179, 194, 227, 358, 388, 454, 485, 716, 895, 908, 970, 1135, 1790, 1940, 2270, 3580, 4540, 17363, 22019, 34726, 40633, 44038, 69452, 81266, 86815, 88076, 110095, 162532, 173630, 203165, 220190, 347260, 406330, 440380, 812660, 3941401, 7882802, 15765604, 19707005, 39414010, 78828020]

約数ペア:

[(1, 78828020), (2, 39414010), (4, 19707005), (5, 15765604), (10, 7882802), (20, 3941401), (97, 812660), (179, 440380), (194, 406330), (227, 347260), (358, 220190), (388, 203165), (454, 173630), (485, 162532), (716, 110095), (895, 88076), (908, 86815), (970, 81266), (1135, 69452), (1790, 44038), (1940, 40633), (2270, 34726), (3580, 22019), (4540, 17363)]