21431168

素因数分解:

$2^7\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{491}}^1$

素因数の和:547

約数の個数: 64

約数和(自身を含む): 48176640

約数和(自身を除く): 26745472

約数列:

[1, 2, 4, 8, 11, 16, 22, 31, 32, 44, 62, 64, 88, 124, 128, 176, 248, 341, 352, 491, 496, 682, 704, 982, 992, 1364, 1408, 1964, 1984, 2728, 3928, 3968, 5401, 5456, 7856, 10802, 10912, 15221, 15712, 21604, 21824, 30442, 31424, 43208, 43648, 60884, 62848, 86416, 121768, 167431, 172832, 243536, 334862, 345664, 487072, 669724, 691328, 974144, 1339448, 1948288, 2678896, 5357792, 10715584, 21431168]

約数ペア:

[(1, 21431168), (2, 10715584), (4, 5357792), (8, 2678896), (11, 1948288), (16, 1339448), (22, 974144), (31, 691328), (32, 669724), (44, 487072), (62, 345664), (64, 334862), (88, 243536), (124, 172832), (128, 167431), (176, 121768), (248, 86416), (341, 62848), (352, 60884), (491, 43648), (496, 43208), (682, 31424), (704, 30442), (982, 21824), (992, 21604), (1364, 15712), (1408, 15221), (1964, 10912), (1984, 10802), (2728, 7856), (3928, 5456), (3968, 5401)]