20991210

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{37}}^1\times {\mathrm{18911}}^1$

素因数の和:18958

約数の個数: 32

約数和(自身を含む): 51743232

約数和(自身を除く): 30752022

約数列:

[1, 2, 3, 5, 6, 10, 15, 30, 37, 74, 111, 185, 222, 370, 555, 1110, 18911, 37822, 56733, 94555, 113466, 189110, 283665, 567330, 699707, 1399414, 2099121, 3498535, 4198242, 6997070, 10495605, 20991210]

約数ペア:

[(1, 20991210), (2, 10495605), (3, 6997070), (5, 4198242), (6, 3498535), (10, 2099121), (15, 1399414), (30, 699707), (37, 567330), (74, 283665), (111, 189110), (185, 113466), (222, 94555), (370, 56733), (555, 37822), (1110, 18911)]