21108800

素因数分解:

$2^6\times 5^2\times {\mathrm{79}}^1\times {\mathrm{167}}^1$

素因数の和:268

約数の個数: 84

約数和(自身を含む): 52913280

約数和(自身を除く): 31804480

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 79, 80, 100, 158, 160, 167, 200, 316, 320, 334, 395, 400, 632, 668, 790, 800, 835, 1264, 1336, 1580, 1600, 1670, 1975, 2528, 2672, 3160, 3340, 3950, 4175, 5056, 5344, 6320, 6680, 7900, 8350, 10688, 12640, 13193, 13360, 15800, 16700, 25280, 26386, 26720, 31600, 33400, 52772, 53440, 63200, 65965, 66800, 105544, 126400, 131930, 133600, 211088, 263860, 267200, 329825, 422176, 527720, 659650, 844352, 1055440, 1319300, 2110880, 2638600, 4221760, 5277200, 10554400, 21108800]

約数ペア:

[(1, 21108800), (2, 10554400), (4, 5277200), (5, 4221760), (8, 2638600), (10, 2110880), (16, 1319300), (20, 1055440), (25, 844352), (32, 659650), (40, 527720), (50, 422176), (64, 329825), (79, 267200), (80, 263860), (100, 211088), (158, 133600), (160, 131930), (167, 126400), (200, 105544), (316, 66800), (320, 65965), (334, 63200), (395, 53440), (400, 52772), (632, 33400), (668, 31600), (790, 26720), (800, 26386), (835, 25280), (1264, 16700), (1336, 15800), (1580, 13360), (1600, 13193), (1670, 12640), (1975, 10688), (2528, 8350), (2672, 7900), (3160, 6680), (3340, 6320), (3950, 5344), (4175, 5056)]