21305726

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{59}}^1$

素因数の和:153

約数の個数: 64

約数和(自身を含む): 39916800

約数和(自身を除く): 18611074

約数列:

[1, 2, 13, 17, 19, 26, 34, 38, 43, 59, 86, 118, 221, 247, 323, 442, 494, 559, 646, 731, 767, 817, 1003, 1118, 1121, 1462, 1534, 1634, 2006, 2242, 2537, 4199, 5074, 8398, 9503, 10621, 13039, 13889, 14573, 19006, 19057, 21242, 26078, 27778, 29146, 32981, 38114, 43129, 48203, 65962, 86258, 96406, 180557, 247741, 361114, 495482, 560677, 626639, 819451, 1121354, 1253278, 1638902, 10652863, 21305726]

約数ペア:

[(1, 21305726), (2, 10652863), (13, 1638902), (17, 1253278), (19, 1121354), (26, 819451), (34, 626639), (38, 560677), (43, 495482), (59, 361114), (86, 247741), (118, 180557), (221, 96406), (247, 86258), (323, 65962), (442, 48203), (494, 43129), (559, 38114), (646, 32981), (731, 29146), (767, 27778), (817, 26078), (1003, 21242), (1118, 19057), (1121, 19006), (1462, 14573), (1534, 13889), (1634, 13039), (2006, 10621), (2242, 9503), (2537, 8398), (4199, 5074)]