21276416

素因数分解:

$2^8\times 7^1\times {\mathrm{31}}^1\times {\mathrm{383}}^1$

素因数の和:437

約数の個数: 72

約数和(自身を含む): 50233344

約数和(自身を除く): 28956928

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 31, 32, 56, 62, 64, 112, 124, 128, 217, 224, 248, 256, 383, 434, 448, 496, 766, 868, 896, 992, 1532, 1736, 1792, 1984, 2681, 3064, 3472, 3968, 5362, 6128, 6944, 7936, 10724, 11873, 12256, 13888, 21448, 23746, 24512, 27776, 42896, 47492, 49024, 55552, 83111, 85792, 94984, 98048, 166222, 171584, 189968, 332444, 343168, 379936, 664888, 686336, 759872, 1329776, 1519744, 2659552, 3039488, 5319104, 10638208, 21276416]

約数ペア:

[(1, 21276416), (2, 10638208), (4, 5319104), (7, 3039488), (8, 2659552), (14, 1519744), (16, 1329776), (28, 759872), (31, 686336), (32, 664888), (56, 379936), (62, 343168), (64, 332444), (112, 189968), (124, 171584), (128, 166222), (217, 98048), (224, 94984), (248, 85792), (256, 83111), (383, 55552), (434, 49024), (448, 47492), (496, 42896), (766, 27776), (868, 24512), (896, 23746), (992, 21448), (1532, 13888), (1736, 12256), (1792, 11873), (1984, 10724), (2681, 7936), (3064, 6944), (3472, 6128), (3968, 5362)]