20471680

素因数分解:

$2^7\times 5^1\times {\mathrm{29}}^1\times {\mathrm{1103}}^1$

素因数の和:1151

約数の個数: 64

約数和(自身を含む): 50673600

約数和(自身を除く): 30201920

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 32, 40, 58, 64, 80, 116, 128, 145, 160, 232, 290, 320, 464, 580, 640, 928, 1103, 1160, 1856, 2206, 2320, 3712, 4412, 4640, 5515, 8824, 9280, 11030, 17648, 18560, 22060, 31987, 35296, 44120, 63974, 70592, 88240, 127948, 141184, 159935, 176480, 255896, 319870, 352960, 511792, 639740, 705920, 1023584, 1279480, 2047168, 2558960, 4094336, 5117920, 10235840, 20471680]

約数ペア:

[(1, 20471680), (2, 10235840), (4, 5117920), (5, 4094336), (8, 2558960), (10, 2047168), (16, 1279480), (20, 1023584), (29, 705920), (32, 639740), (40, 511792), (58, 352960), (64, 319870), (80, 255896), (116, 176480), (128, 159935), (145, 141184), (160, 127948), (232, 88240), (290, 70592), (320, 63974), (464, 44120), (580, 35296), (640, 31987), (928, 22060), (1103, 18560), (1160, 17648), (1856, 11030), (2206, 9280), (2320, 8824), (3712, 5515), (4412, 4640)]