21147380

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^2\times {\mathrm{29}}^1\times {\mathrm{101}}^1$

素因数の和:177

約数の個数: 72

約数和(自身を含む): 48966120

約数和(自身を除く): 27818740

約数列:

[1, 2, 4, 5, 10, 19, 20, 29, 38, 58, 76, 95, 101, 116, 145, 190, 202, 290, 361, 380, 404, 505, 551, 580, 722, 1010, 1102, 1444, 1805, 1919, 2020, 2204, 2755, 2929, 3610, 3838, 5510, 5858, 7220, 7676, 9595, 10469, 11020, 11716, 14645, 19190, 20938, 29290, 36461, 38380, 41876, 52345, 55651, 58580, 72922, 104690, 111302, 145844, 182305, 209380, 222604, 278255, 364610, 556510, 729220, 1057369, 1113020, 2114738, 4229476, 5286845, 10573690, 21147380]

約数ペア:

[(1, 21147380), (2, 10573690), (4, 5286845), (5, 4229476), (10, 2114738), (19, 1113020), (20, 1057369), (29, 729220), (38, 556510), (58, 364610), (76, 278255), (95, 222604), (101, 209380), (116, 182305), (145, 145844), (190, 111302), (202, 104690), (290, 72922), (361, 58580), (380, 55651), (404, 52345), (505, 41876), (551, 38380), (580, 36461), (722, 29290), (1010, 20938), (1102, 19190), (1444, 14645), (1805, 11716), (1919, 11020), (2020, 10469), (2204, 9595), (2755, 7676), (2929, 7220), (3610, 5858), (3838, 5510)]