20838400

素因数分解:

$2^{11}\times 5^2\times {\mathrm{11}}^1\times {\mathrm{37}}^1$

素因数の和:80

約数の個数: 144

約数和(自身を含む): 57886920

約数和(自身を除く): 37048520

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 25, 32, 37, 40, 44, 50, 55, 64, 74, 80, 88, 100, 110, 128, 148, 160, 176, 185, 200, 220, 256, 275, 296, 320, 352, 370, 400, 407, 440, 512, 550, 592, 640, 704, 740, 800, 814, 880, 925, 1024, 1100, 1184, 1280, 1408, 1480, 1600, 1628, 1760, 1850, 2035, 2048, 2200, 2368, 2560, 2816, 2960, 3200, 3256, 3520, 3700, 4070, 4400, 4736, 5120, 5632, 5920, 6400, 6512, 7040, 7400, 8140, 8800, 9472, 10175, 10240, 11264, 11840, 12800, 13024, 14080, 14800, 16280, 17600, 18944, 20350, 22528, 23680, 25600, 26048, 28160, 29600, 32560, 35200, 37888, 40700, 47360, 51200, 52096, 56320, 59200, 65120, 70400, 75776, 81400, 94720, 104192, 112640, 118400, 130240, 140800, 162800, 189440, 208384, 236800, 260480, 281600, 325600, 378880, 416768, 473600, 520960, 563200, 651200, 833536, 947200, 1041920, 1302400, 1894400, 2083840, 2604800, 4167680, 5209600, 10419200, 20838400]

約数ペア:

[(1, 20838400), (2, 10419200), (4, 5209600), (5, 4167680), (8, 2604800), (10, 2083840), (11, 1894400), (16, 1302400), (20, 1041920), (22, 947200), (25, 833536), (32, 651200), (37, 563200), (40, 520960), (44, 473600), (50, 416768), (55, 378880), (64, 325600), (74, 281600), (80, 260480), (88, 236800), (100, 208384), (110, 189440), (128, 162800), (148, 140800), (160, 130240), (176, 118400), (185, 112640), (200, 104192), (220, 94720), (256, 81400), (275, 75776), (296, 70400), (320, 65120), (352, 59200), (370, 56320), (400, 52096), (407, 51200), (440, 47360), (512, 40700), (550, 37888), (592, 35200), (640, 32560), (704, 29600), (740, 28160), (800, 26048), (814, 25600), (880, 23680), (925, 22528), (1024, 20350), (1100, 18944), (1184, 17600), (1280, 16280), (1408, 14800), (1480, 14080), (1600, 13024), (1628, 12800), (1760, 11840), (1850, 11264), (2035, 10240), (2048, 10175), (2200, 9472), (2368, 8800), (2560, 8140), (2816, 7400), (2960, 7040), (3200, 6512), (3256, 6400), (3520, 5920), (3700, 5632), (4070, 5120), (4400, 4736)]