398433920

素因数分解:

$2^7\times 5^1\times {\mathrm{617}}^1\times {\mathrm{1009}}^1$

素因数の和:1645

約数の個数: 64

約数和(自身を含む): 954995400

約数和(自身を除く): 556561480

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 617, 640, 1009, 1234, 2018, 2468, 3085, 4036, 4936, 5045, 6170, 8072, 9872, 10090, 12340, 16144, 19744, 20180, 24680, 32288, 39488, 40360, 49360, 64576, 78976, 80720, 98720, 129152, 161440, 197440, 322880, 394880, 622553, 645760, 1245106, 2490212, 3112765, 4980424, 6225530, 9960848, 12451060, 19921696, 24902120, 39843392, 49804240, 79686784, 99608480, 199216960, 398433920]

約数ペア:

[(1, 398433920), (2, 199216960), (4, 99608480), (5, 79686784), (8, 49804240), (10, 39843392), (16, 24902120), (20, 19921696), (32, 12451060), (40, 9960848), (64, 6225530), (80, 4980424), (128, 3112765), (160, 2490212), (320, 1245106), (617, 645760), (640, 622553), (1009, 394880), (1234, 322880), (2018, 197440), (2468, 161440), (3085, 129152), (4036, 98720), (4936, 80720), (5045, 78976), (6170, 64576), (8072, 49360), (9872, 40360), (10090, 39488), (12340, 32288), (16144, 24680), (19744, 20180)]