20406980

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{109}}^1$

素因数の和:189

約数の個数: 96

約数和(自身を含む): 50561280

約数和(自身を除く): 30154300

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 23, 37, 44, 46, 55, 74, 92, 109, 110, 115, 148, 185, 218, 220, 230, 253, 370, 407, 436, 460, 506, 545, 740, 814, 851, 1012, 1090, 1199, 1265, 1628, 1702, 2035, 2180, 2398, 2507, 2530, 3404, 4033, 4070, 4255, 4796, 5014, 5060, 5995, 8066, 8140, 8510, 9361, 10028, 11990, 12535, 16132, 17020, 18722, 20165, 23980, 25070, 27577, 37444, 40330, 44363, 46805, 50140, 55154, 80660, 88726, 92759, 93610, 110308, 137885, 177452, 185518, 187220, 221815, 275770, 371036, 443630, 463795, 551540, 887260, 927590, 1020349, 1855180, 2040698, 4081396, 5101745, 10203490, 20406980]

約数ペア:

[(1, 20406980), (2, 10203490), (4, 5101745), (5, 4081396), (10, 2040698), (11, 1855180), (20, 1020349), (22, 927590), (23, 887260), (37, 551540), (44, 463795), (46, 443630), (55, 371036), (74, 275770), (92, 221815), (109, 187220), (110, 185518), (115, 177452), (148, 137885), (185, 110308), (218, 93610), (220, 92759), (230, 88726), (253, 80660), (370, 55154), (407, 50140), (436, 46805), (460, 44363), (506, 40330), (545, 37444), (740, 27577), (814, 25070), (851, 23980), (1012, 20165), (1090, 18722), (1199, 17020), (1265, 16132), (1628, 12535), (1702, 11990), (2035, 10028), (2180, 9361), (2398, 8510), (2507, 8140), (2530, 8066), (3404, 5995), (4033, 5060), (4070, 5014), (4255, 4796)]