20722480

素因数分解:

$2^4\times 5^1\times {\mathrm{431}}^1\times {\mathrm{601}}^1$

素因数の和:1045

約数の個数: 40

約数和(自身を含む): 48371904

約数和(自身を除く): 27649424

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 431, 601, 862, 1202, 1724, 2155, 2404, 3005, 3448, 4310, 4808, 6010, 6896, 8620, 9616, 12020, 17240, 24040, 34480, 48080, 259031, 518062, 1036124, 1295155, 2072248, 2590310, 4144496, 5180620, 10361240, 20722480]

約数ペア:

[(1, 20722480), (2, 10361240), (4, 5180620), (5, 4144496), (8, 2590310), (10, 2072248), (16, 1295155), (20, 1036124), (40, 518062), (80, 259031), (431, 48080), (601, 34480), (862, 24040), (1202, 17240), (1724, 12020), (2155, 9616), (2404, 8620), (3005, 6896), (3448, 6010), (4310, 4808)]