21160720

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{1303}}^1$

素因数の和:1352

約数の個数: 80

約数和(自身を含む): 58210560

約数和(自身を除く): 37049840

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 29, 35, 40, 56, 58, 70, 80, 112, 116, 140, 145, 203, 232, 280, 290, 406, 464, 560, 580, 812, 1015, 1160, 1303, 1624, 2030, 2320, 2606, 3248, 4060, 5212, 6515, 8120, 9121, 10424, 13030, 16240, 18242, 20848, 26060, 36484, 37787, 45605, 52120, 72968, 75574, 91210, 104240, 145936, 151148, 182420, 188935, 264509, 302296, 364840, 377870, 529018, 604592, 729680, 755740, 1058036, 1322545, 1511480, 2116072, 2645090, 3022960, 4232144, 5290180, 10580360, 21160720]

約数ペア:

[(1, 21160720), (2, 10580360), (4, 5290180), (5, 4232144), (7, 3022960), (8, 2645090), (10, 2116072), (14, 1511480), (16, 1322545), (20, 1058036), (28, 755740), (29, 729680), (35, 604592), (40, 529018), (56, 377870), (58, 364840), (70, 302296), (80, 264509), (112, 188935), (116, 182420), (140, 151148), (145, 145936), (203, 104240), (232, 91210), (280, 75574), (290, 72968), (406, 52120), (464, 45605), (560, 37787), (580, 36484), (812, 26060), (1015, 20848), (1160, 18242), (1303, 16240), (1624, 13030), (2030, 10424), (2320, 9121), (2606, 8120), (3248, 6515), (4060, 5212)]