21721580

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{2203}}^1$

素因数の和:2258

約数の個数: 48

約数和(自身を含む): 49986720

約数和(自身を除く): 28265140

約数列:

[1, 2, 4, 5, 10, 17, 20, 29, 34, 58, 68, 85, 116, 145, 170, 290, 340, 493, 580, 986, 1972, 2203, 2465, 4406, 4930, 8812, 9860, 11015, 22030, 37451, 44060, 63887, 74902, 127774, 149804, 187255, 255548, 319435, 374510, 638870, 749020, 1086079, 1277740, 2172158, 4344316, 5430395, 10860790, 21721580]

約数ペア:

[(1, 21721580), (2, 10860790), (4, 5430395), (5, 4344316), (10, 2172158), (17, 1277740), (20, 1086079), (29, 749020), (34, 638870), (58, 374510), (68, 319435), (85, 255548), (116, 187255), (145, 149804), (170, 127774), (290, 74902), (340, 63887), (493, 44060), (580, 37451), (986, 22030), (1972, 11015), (2203, 9860), (2465, 8812), (4406, 4930)]