21465668

素因数分解:

$2^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{157}}^1\times {\mathrm{257}}^1$

素因数の和:444

約数の個数: 48

約数和(自身を含む): 45655680

約数和(自身を除く): 24190012

約数列:

[1, 2, 4, 7, 14, 19, 28, 38, 76, 133, 157, 257, 266, 314, 514, 532, 628, 1028, 1099, 1799, 2198, 2983, 3598, 4396, 4883, 5966, 7196, 9766, 11932, 19532, 20881, 34181, 40349, 41762, 68362, 80698, 83524, 136724, 161396, 282443, 564886, 766631, 1129772, 1533262, 3066524, 5366417, 10732834, 21465668]

約数ペア:

[(1, 21465668), (2, 10732834), (4, 5366417), (7, 3066524), (14, 1533262), (19, 1129772), (28, 766631), (38, 564886), (76, 282443), (133, 161396), (157, 136724), (257, 83524), (266, 80698), (314, 68362), (514, 41762), (532, 40349), (628, 34181), (1028, 20881), (1099, 19532), (1799, 11932), (2198, 9766), (2983, 7196), (3598, 5966), (4396, 4883)]