21197180

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{179}}^1\times {\mathrm{191}}^1$

素因数の和:410

約数の個数: 48

約数和(自身を含む): 46448640

約数和(自身を除く): 25251460

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 179, 191, 310, 358, 382, 620, 716, 764, 895, 955, 1790, 1910, 3580, 3820, 5549, 5921, 11098, 11842, 22196, 23684, 27745, 29605, 34189, 55490, 59210, 68378, 110980, 118420, 136756, 170945, 341890, 683780, 1059859, 2119718, 4239436, 5299295, 10598590, 21197180]

約数ペア:

[(1, 21197180), (2, 10598590), (4, 5299295), (5, 4239436), (10, 2119718), (20, 1059859), (31, 683780), (62, 341890), (124, 170945), (155, 136756), (179, 118420), (191, 110980), (310, 68378), (358, 59210), (382, 55490), (620, 34189), (716, 29605), (764, 27745), (895, 23684), (955, 22196), (1790, 11842), (1910, 11098), (3580, 5921), (3820, 5549)]