20161555240

素因数分解:

$2^3\times 5^1\times {\mathrm{79}}^1\times {\mathrm{139}}^1\times {\mathrm{197}}^1\times {\mathrm{233}}^1$

素因数の和:659

約数の個数: 128

約数和(自身を含む): 46702656000

約数和(自身を除く): 26541100760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 79, 139, 158, 197, 233, 278, 316, 394, 395, 466, 556, 632, 695, 788, 790, 932, 985, 1112, 1165, 1390, 1576, 1580, 1864, 1970, 2330, 2780, 3160, 3940, 4660, 5560, 7880, 9320, 10981, 15563, 18407, 21962, 27383, 31126, 32387, 36814, 43924, 45901, 54766, 54905, 62252, 64774, 73628, 77815, 87848, 91802, 92035, 109532, 109810, 124504, 129548, 136915, 147256, 155630, 161935, 183604, 184070, 219064, 219620, 229505, 259096, 273830, 311260, 323870, 367208, 368140, 439240, 459010, 547660, 622520, 647740, 736280, 918020, 1095320, 1295480, 1836040, 2163257, 2558573, 3626179, 4326514, 5117146, 6380239, 7252358, 8653028, 10234292, 10816285, 12760478, 12792865, 14504716, 17306056, 18130895, 20468584, 21632570, 25520956, 25585730, 29009432, 31901195, 36261790, 43265140, 51041912, 51171460, 63802390, 72523580, 86530280, 102342920, 127604780, 145047160, 255209560, 504038881, 1008077762, 2016155524, 2520194405, 4032311048, 5040388810, 10080777620, 20161555240]

約数ペア:

[(1, 20161555240), (2, 10080777620), (4, 5040388810), (5, 4032311048), (8, 2520194405), (10, 2016155524), (20, 1008077762), (40, 504038881), (79, 255209560), (139, 145047160), (158, 127604780), (197, 102342920), (233, 86530280), (278, 72523580), (316, 63802390), (394, 51171460), (395, 51041912), (466, 43265140), (556, 36261790), (632, 31901195), (695, 29009432), (788, 25585730), (790, 25520956), (932, 21632570), (985, 20468584), (1112, 18130895), (1165, 17306056), (1390, 14504716), (1576, 12792865), (1580, 12760478), (1864, 10816285), (1970, 10234292), (2330, 8653028), (2780, 7252358), (3160, 6380239), (3940, 5117146), (4660, 4326514), (5560, 3626179), (7880, 2558573), (9320, 2163257), (10981, 1836040), (15563, 1295480), (18407, 1095320), (21962, 918020), (27383, 736280), (31126, 647740), (32387, 622520), (36814, 547660), (43924, 459010), (45901, 439240), (54766, 368140), (54905, 367208), (62252, 323870), (64774, 311260), (73628, 273830), (77815, 259096), (87848, 229505), (91802, 219620), (92035, 219064), (109532, 184070), (109810, 183604), (124504, 161935), (129548, 155630), (136915, 147256)]