20581600

素因数分解:

$2^5\times 5^2\times {\mathrm{13}}^1\times {\mathrm{1979}}^1$

素因数の和:2012

約数の個数: 72

約数和(自身を含む): 54137160

約数和(自身を除く): 33555560

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 25, 26, 32, 40, 50, 52, 65, 80, 100, 104, 130, 160, 200, 208, 260, 325, 400, 416, 520, 650, 800, 1040, 1300, 1979, 2080, 2600, 3958, 5200, 7916, 9895, 10400, 15832, 19790, 25727, 31664, 39580, 49475, 51454, 63328, 79160, 98950, 102908, 128635, 158320, 197900, 205816, 257270, 316640, 395800, 411632, 514540, 643175, 791600, 823264, 1029080, 1286350, 1583200, 2058160, 2572700, 4116320, 5145400, 10290800, 20581600]

約数ペア:

[(1, 20581600), (2, 10290800), (4, 5145400), (5, 4116320), (8, 2572700), (10, 2058160), (13, 1583200), (16, 1286350), (20, 1029080), (25, 823264), (26, 791600), (32, 643175), (40, 514540), (50, 411632), (52, 395800), (65, 316640), (80, 257270), (100, 205816), (104, 197900), (130, 158320), (160, 128635), (200, 102908), (208, 98950), (260, 79160), (325, 63328), (400, 51454), (416, 49475), (520, 39580), (650, 31664), (800, 25727), (1040, 19790), (1300, 15832), (1979, 10400), (2080, 9895), (2600, 7916), (3958, 5200)]