20529920

素因数分解:

$2^8\times 5^1\times {\mathrm{43}}^1\times {\mathrm{373}}^1$

素因数の和:437

約数の個数: 72

約数和(自身を含む): 50454096

約数和(自身を除く): 29924176

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 43, 64, 80, 86, 128, 160, 172, 215, 256, 320, 344, 373, 430, 640, 688, 746, 860, 1280, 1376, 1492, 1720, 1865, 2752, 2984, 3440, 3730, 5504, 5968, 6880, 7460, 11008, 11936, 13760, 14920, 16039, 23872, 27520, 29840, 32078, 47744, 55040, 59680, 64156, 80195, 95488, 119360, 128312, 160390, 238720, 256624, 320780, 477440, 513248, 641560, 1026496, 1283120, 2052992, 2566240, 4105984, 5132480, 10264960, 20529920]

約数ペア:

[(1, 20529920), (2, 10264960), (4, 5132480), (5, 4105984), (8, 2566240), (10, 2052992), (16, 1283120), (20, 1026496), (32, 641560), (40, 513248), (43, 477440), (64, 320780), (80, 256624), (86, 238720), (128, 160390), (160, 128312), (172, 119360), (215, 95488), (256, 80195), (320, 64156), (344, 59680), (373, 55040), (430, 47744), (640, 32078), (688, 29840), (746, 27520), (860, 23872), (1280, 16039), (1376, 14920), (1492, 13760), (1720, 11936), (1865, 11008), (2752, 7460), (2984, 6880), (3440, 5968), (3730, 5504)]