20570725

素因数分解:

$5^2\times 7^1\times {\mathrm{41}}^1\times {\mathrm{47}}^1\times {\mathrm{61}}^1$

素因数の和:166

約数の個数: 48

約数和(自身を含む): 30998016

約数和(自身を除く): 10427291

約数列:

[1, 5, 7, 25, 35, 41, 47, 61, 175, 205, 235, 287, 305, 329, 427, 1025, 1175, 1435, 1525, 1645, 1927, 2135, 2501, 2867, 7175, 8225, 9635, 10675, 12505, 13489, 14335, 17507, 20069, 48175, 62525, 67445, 71675, 87535, 100345, 117547, 337225, 437675, 501725, 587735, 822829, 2938675, 4114145, 20570725]

約数ペア:

[(1, 20570725), (5, 4114145), (7, 2938675), (25, 822829), (35, 587735), (41, 501725), (47, 437675), (61, 337225), (175, 117547), (205, 100345), (235, 87535), (287, 71675), (305, 67445), (329, 62525), (427, 48175), (1025, 20069), (1175, 17507), (1435, 14335), (1525, 13489), (1645, 12505), (1927, 10675), (2135, 9635), (2501, 8225), (2867, 7175)]