21547520

素因数分解:

$2^9\times 5^1\times {\mathrm{19}}^1\times {\mathrm{443}}^1$

素因数の和:485

約数の個数: 80

約数和(自身を含む): 54505440

約数和(自身を除く): 32957920

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 32, 38, 40, 64, 76, 80, 95, 128, 152, 160, 190, 256, 304, 320, 380, 443, 512, 608, 640, 760, 886, 1216, 1280, 1520, 1772, 2215, 2432, 2560, 3040, 3544, 4430, 4864, 6080, 7088, 8417, 8860, 9728, 12160, 14176, 16834, 17720, 24320, 28352, 33668, 35440, 42085, 48640, 56704, 67336, 70880, 84170, 113408, 134672, 141760, 168340, 226816, 269344, 283520, 336680, 538688, 567040, 673360, 1077376, 1134080, 1346720, 2154752, 2693440, 4309504, 5386880, 10773760, 21547520]

約数ペア:

[(1, 21547520), (2, 10773760), (4, 5386880), (5, 4309504), (8, 2693440), (10, 2154752), (16, 1346720), (19, 1134080), (20, 1077376), (32, 673360), (38, 567040), (40, 538688), (64, 336680), (76, 283520), (80, 269344), (95, 226816), (128, 168340), (152, 141760), (160, 134672), (190, 113408), (256, 84170), (304, 70880), (320, 67336), (380, 56704), (443, 48640), (512, 42085), (608, 35440), (640, 33668), (760, 28352), (886, 24320), (1216, 17720), (1280, 16834), (1520, 14176), (1772, 12160), (2215, 9728), (2432, 8860), (2560, 8417), (3040, 7088), (3544, 6080), (4430, 4864)]