21304580

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{179}}^1\times {\mathrm{541}}^1$

素因数の和:740

約数の個数: 48

約数和(自身を含む): 49170240

約数和(自身を除く): 27865660

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 179, 220, 358, 541, 716, 895, 1082, 1790, 1969, 2164, 2705, 3580, 3938, 5410, 5951, 7876, 9845, 10820, 11902, 19690, 23804, 29755, 39380, 59510, 96839, 119020, 193678, 387356, 484195, 968390, 1065229, 1936780, 2130458, 4260916, 5326145, 10652290, 21304580]

約数ペア:

[(1, 21304580), (2, 10652290), (4, 5326145), (5, 4260916), (10, 2130458), (11, 1936780), (20, 1065229), (22, 968390), (44, 484195), (55, 387356), (110, 193678), (179, 119020), (220, 96839), (358, 59510), (541, 39380), (716, 29755), (895, 23804), (1082, 19690), (1790, 11902), (1969, 10820), (2164, 9845), (2705, 7876), (3580, 5951), (3938, 5410)]