20720896

素因数分解:

$2^8\times 7^1\times {\mathrm{31}}^1\times {\mathrm{373}}^1$

素因数の和:427

約数の個数: 72

約数和(自身を含む): 48925184

約数和(自身を除く): 28204288

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 31, 32, 56, 62, 64, 112, 124, 128, 217, 224, 248, 256, 373, 434, 448, 496, 746, 868, 896, 992, 1492, 1736, 1792, 1984, 2611, 2984, 3472, 3968, 5222, 5968, 6944, 7936, 10444, 11563, 11936, 13888, 20888, 23126, 23872, 27776, 41776, 46252, 47744, 55552, 80941, 83552, 92504, 95488, 161882, 167104, 185008, 323764, 334208, 370016, 647528, 668416, 740032, 1295056, 1480064, 2590112, 2960128, 5180224, 10360448, 20720896]

約数ペア:

[(1, 20720896), (2, 10360448), (4, 5180224), (7, 2960128), (8, 2590112), (14, 1480064), (16, 1295056), (28, 740032), (31, 668416), (32, 647528), (56, 370016), (62, 334208), (64, 323764), (112, 185008), (124, 167104), (128, 161882), (217, 95488), (224, 92504), (248, 83552), (256, 80941), (373, 55552), (434, 47744), (448, 46252), (496, 41776), (746, 27776), (868, 23872), (896, 23126), (992, 20888), (1492, 13888), (1736, 11936), (1792, 11563), (1984, 10444), (2611, 7936), (2984, 6944), (3472, 5968), (3968, 5222)]