21670495

素因数分解:

$5^1\times 7^2\times {\mathrm{11}}^2\times {\mathrm{17}}^1\times {\mathrm{43}}^1$

素因数の和:101

約数の個数: 72

約数和(自身を含む): 36024912

約数和(自身を除く): 14354417

約数列:

[1, 5, 7, 11, 17, 35, 43, 49, 55, 77, 85, 119, 121, 187, 215, 245, 301, 385, 473, 539, 595, 605, 731, 833, 847, 935, 1309, 1505, 2057, 2107, 2365, 2695, 3311, 3655, 4165, 4235, 5117, 5203, 5929, 6545, 8041, 9163, 10285, 10535, 14399, 16555, 23177, 25585, 26015, 29645, 35819, 36421, 40205, 45815, 56287, 71995, 88451, 100793, 115885, 179095, 182105, 254947, 281435, 394009, 442255, 503965, 619157, 1274735, 1970045, 3095785, 4334099, 21670495]

約数ペア:

[(1, 21670495), (5, 4334099), (7, 3095785), (11, 1970045), (17, 1274735), (35, 619157), (43, 503965), (49, 442255), (55, 394009), (77, 281435), (85, 254947), (119, 182105), (121, 179095), (187, 115885), (215, 100793), (245, 88451), (301, 71995), (385, 56287), (473, 45815), (539, 40205), (595, 36421), (605, 35819), (731, 29645), (833, 26015), (847, 25585), (935, 23177), (1309, 16555), (1505, 14399), (2057, 10535), (2107, 10285), (2365, 9163), (2695, 8041), (3311, 6545), (3655, 5929), (4165, 5203), (4235, 5117)]