1991830960

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{661}}^1\times {\mathrm{5381}}^1$

素因数の和:6062

約数の個数: 80

約数和(自身を含む): 5301571392

約数和(自身を除く): 3309740432

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 280, 560, 661, 1322, 2644, 3305, 4627, 5288, 5381, 6610, 9254, 10576, 10762, 13220, 18508, 21524, 23135, 26440, 26905, 37016, 37667, 43048, 46270, 52880, 53810, 74032, 75334, 86096, 92540, 107620, 150668, 185080, 188335, 215240, 301336, 370160, 376670, 430480, 602672, 753340, 1506680, 3013360, 3556841, 7113682, 14227364, 17784205, 24897887, 28454728, 35568410, 49795774, 56909456, 71136820, 99591548, 124489435, 142273640, 199183096, 248978870, 284547280, 398366192, 497957740, 995915480, 1991830960]

約数ペア:

[(1, 1991830960), (2, 995915480), (4, 497957740), (5, 398366192), (7, 284547280), (8, 248978870), (10, 199183096), (14, 142273640), (16, 124489435), (20, 99591548), (28, 71136820), (35, 56909456), (40, 49795774), (56, 35568410), (70, 28454728), (80, 24897887), (112, 17784205), (140, 14227364), (280, 7113682), (560, 3556841), (661, 3013360), (1322, 1506680), (2644, 753340), (3305, 602672), (4627, 430480), (5288, 376670), (5381, 370160), (6610, 301336), (9254, 215240), (10576, 188335), (10762, 185080), (13220, 150668), (18508, 107620), (21524, 92540), (23135, 86096), (26440, 75334), (26905, 74032), (37016, 53810), (37667, 52880), (43048, 46270)]