19940820

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{59}}^1\times {\mathrm{131}}^1$

素因数の和:245

約数の個数: 96

約数和(自身を含む): 58544640

約数和(自身を除く): 38603820

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 43, 59, 60, 86, 118, 129, 131, 172, 177, 215, 236, 258, 262, 295, 354, 393, 430, 516, 524, 590, 645, 655, 708, 786, 860, 885, 1180, 1290, 1310, 1572, 1770, 1965, 2537, 2580, 2620, 3540, 3930, 5074, 5633, 7611, 7729, 7860, 10148, 11266, 12685, 15222, 15458, 16899, 22532, 23187, 25370, 28165, 30444, 30916, 33798, 38055, 38645, 46374, 50740, 56330, 67596, 76110, 77290, 84495, 92748, 112660, 115935, 152220, 154580, 168990, 231870, 332347, 337980, 463740, 664694, 997041, 1329388, 1661735, 1994082, 3323470, 3988164, 4985205, 6646940, 9970410, 19940820]

約数ペア:

[(1, 19940820), (2, 9970410), (3, 6646940), (4, 4985205), (5, 3988164), (6, 3323470), (10, 1994082), (12, 1661735), (15, 1329388), (20, 997041), (30, 664694), (43, 463740), (59, 337980), (60, 332347), (86, 231870), (118, 168990), (129, 154580), (131, 152220), (172, 115935), (177, 112660), (215, 92748), (236, 84495), (258, 77290), (262, 76110), (295, 67596), (354, 56330), (393, 50740), (430, 46374), (516, 38645), (524, 38055), (590, 33798), (645, 30916), (655, 30444), (708, 28165), (786, 25370), (860, 23187), (885, 22532), (1180, 16899), (1290, 15458), (1310, 15222), (1572, 12685), (1770, 11266), (1965, 10148), (2537, 7860), (2580, 7729), (2620, 7611), (3540, 5633), (3930, 5074)]