18189940

素因数分解:

$2^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{47}}^1\times {\mathrm{523}}^1$

素因数の和:616

約数の個数: 48

約数和(自身を含む): 40142592

約数和(自身を除く): 21952652

約数列:

[1, 2, 4, 5, 10, 20, 37, 47, 74, 94, 148, 185, 188, 235, 370, 470, 523, 740, 940, 1046, 1739, 2092, 2615, 3478, 5230, 6956, 8695, 10460, 17390, 19351, 24581, 34780, 38702, 49162, 77404, 96755, 98324, 122905, 193510, 245810, 387020, 491620, 909497, 1818994, 3637988, 4547485, 9094970, 18189940]

約数ペア:

[(1, 18189940), (2, 9094970), (4, 4547485), (5, 3637988), (10, 1818994), (20, 909497), (37, 491620), (47, 387020), (74, 245810), (94, 193510), (148, 122905), (185, 98324), (188, 96755), (235, 77404), (370, 49162), (470, 38702), (523, 34780), (740, 24581), (940, 19351), (1046, 17390), (1739, 10460), (2092, 8695), (2615, 6956), (3478, 5230)]