21227864

素因数分解:

$2^3\times 7^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{281}}^1$

素因数の和:384

約数の個数: 64

約数和(自身を含む): 48729600

約数和(自身を除く): 27501736

約数列:

[1, 2, 4, 7, 8, 14, 19, 28, 38, 56, 71, 76, 133, 142, 152, 266, 281, 284, 497, 532, 562, 568, 994, 1064, 1124, 1349, 1967, 1988, 2248, 2698, 3934, 3976, 5339, 5396, 7868, 9443, 10678, 10792, 15736, 18886, 19951, 21356, 37373, 37772, 39902, 42712, 74746, 75544, 79804, 139657, 149492, 159608, 279314, 298984, 379069, 558628, 758138, 1117256, 1516276, 2653483, 3032552, 5306966, 10613932, 21227864]

約数ペア:

[(1, 21227864), (2, 10613932), (4, 5306966), (7, 3032552), (8, 2653483), (14, 1516276), (19, 1117256), (28, 758138), (38, 558628), (56, 379069), (71, 298984), (76, 279314), (133, 159608), (142, 149492), (152, 139657), (266, 79804), (281, 75544), (284, 74746), (497, 42712), (532, 39902), (562, 37772), (568, 37373), (994, 21356), (1064, 19951), (1124, 18886), (1349, 15736), (1967, 10792), (1988, 10678), (2248, 9443), (2698, 7868), (3934, 5396), (3976, 5339)]