21145291280

素因数分解:

$2^4\times 5^1\times {\mathrm{43}}^1\times {\mathrm{53}}^1\times {\mathrm{115979}}^1$

素因数の和:116088

約数の個数: 80

約数和(自身を含む): 51255737280

約数和(自身を除く): 30110446000

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 43, 53, 80, 86, 106, 172, 212, 215, 265, 344, 424, 430, 530, 688, 848, 860, 1060, 1720, 2120, 2279, 3440, 4240, 4558, 9116, 11395, 18232, 22790, 36464, 45580, 91160, 115979, 182320, 231958, 463916, 579895, 927832, 1159790, 1855664, 2319580, 4639160, 4987097, 6146887, 9278320, 9974194, 12293774, 19948388, 24587548, 24935485, 30734435, 39896776, 49175096, 49870970, 61468870, 79793552, 98350192, 99741940, 122937740, 199483880, 245875480, 264316141, 398967760, 491750960, 528632282, 1057264564, 1321580705, 2114529128, 2643161410, 4229058256, 5286322820, 10572645640, 21145291280]

約数ペア:

[(1, 21145291280), (2, 10572645640), (4, 5286322820), (5, 4229058256), (8, 2643161410), (10, 2114529128), (16, 1321580705), (20, 1057264564), (40, 528632282), (43, 491750960), (53, 398967760), (80, 264316141), (86, 245875480), (106, 199483880), (172, 122937740), (212, 99741940), (215, 98350192), (265, 79793552), (344, 61468870), (424, 49870970), (430, 49175096), (530, 39896776), (688, 30734435), (848, 24935485), (860, 24587548), (1060, 19948388), (1720, 12293774), (2120, 9974194), (2279, 9278320), (3440, 6146887), (4240, 4987097), (4558, 4639160), (9116, 2319580), (11395, 1855664), (18232, 1159790), (22790, 927832), (36464, 579895), (45580, 463916), (91160, 231958), (115979, 182320)]