21819280

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{829}}^1$

素因数の和:896

約数の個数: 80

約数和(自身を含む): 59281920

約数和(自身を除く): 37462640

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 47, 56, 70, 80, 94, 112, 140, 188, 235, 280, 329, 376, 470, 560, 658, 752, 829, 940, 1316, 1645, 1658, 1880, 2632, 3290, 3316, 3760, 4145, 5264, 5803, 6580, 6632, 8290, 11606, 13160, 13264, 16580, 23212, 26320, 29015, 33160, 38963, 46424, 58030, 66320, 77926, 92848, 116060, 155852, 194815, 232120, 272741, 311704, 389630, 464240, 545482, 623408, 779260, 1090964, 1363705, 1558520, 2181928, 2727410, 3117040, 4363856, 5454820, 10909640, 21819280]

約数ペア:

[(1, 21819280), (2, 10909640), (4, 5454820), (5, 4363856), (7, 3117040), (8, 2727410), (10, 2181928), (14, 1558520), (16, 1363705), (20, 1090964), (28, 779260), (35, 623408), (40, 545482), (47, 464240), (56, 389630), (70, 311704), (80, 272741), (94, 232120), (112, 194815), (140, 155852), (188, 116060), (235, 92848), (280, 77926), (329, 66320), (376, 58030), (470, 46424), (560, 38963), (658, 33160), (752, 29015), (829, 26320), (940, 23212), (1316, 16580), (1645, 13264), (1658, 13160), (1880, 11606), (2632, 8290), (3290, 6632), (3316, 6580), (3760, 5803), (4145, 5264)]