20156420

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{47}}^1\times {\mathrm{523}}^1$

素因数の和:620

約数の個数: 48

約数和(自身を含む): 44368128

約数和(自身を除く): 24211708

約数列:

[1, 2, 4, 5, 10, 20, 41, 47, 82, 94, 164, 188, 205, 235, 410, 470, 523, 820, 940, 1046, 1927, 2092, 2615, 3854, 5230, 7708, 9635, 10460, 19270, 21443, 24581, 38540, 42886, 49162, 85772, 98324, 107215, 122905, 214430, 245810, 428860, 491620, 1007821, 2015642, 4031284, 5039105, 10078210, 20156420]

約数ペア:

[(1, 20156420), (2, 10078210), (4, 5039105), (5, 4031284), (10, 2015642), (20, 1007821), (41, 491620), (47, 428860), (82, 245810), (94, 214430), (164, 122905), (188, 107215), (205, 98324), (235, 85772), (410, 49162), (470, 42886), (523, 38540), (820, 24581), (940, 21443), (1046, 19270), (1927, 10460), (2092, 9635), (2615, 7708), (3854, 5230)]