21917980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{3331}}^1$

素因数の和:3394

約数の個数: 48

約数和(自身を含む): 53738496

約数和(自身を除く): 31820516

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 47, 70, 94, 140, 188, 235, 329, 470, 658, 940, 1316, 1645, 3290, 3331, 6580, 6662, 13324, 16655, 23317, 33310, 46634, 66620, 93268, 116585, 156557, 233170, 313114, 466340, 626228, 782785, 1095899, 1565570, 2191798, 3131140, 4383596, 5479495, 10958990, 21917980]

約数ペア:

[(1, 21917980), (2, 10958990), (4, 5479495), (5, 4383596), (7, 3131140), (10, 2191798), (14, 1565570), (20, 1095899), (28, 782785), (35, 626228), (47, 466340), (70, 313114), (94, 233170), (140, 156557), (188, 116585), (235, 93268), (329, 66620), (470, 46634), (658, 33310), (940, 23317), (1316, 16655), (1645, 13324), (3290, 6662), (3331, 6580)]