20986720

素因数分解:

$2^5\times 5^1\times {\mathrm{29}}^1\times {\mathrm{4523}}^1$

素因数の和:4567

約数の個数: 48

約数和(自身を含む): 51302160

約数和(自身を除く): 30315440

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 32, 40, 58, 80, 116, 145, 160, 232, 290, 464, 580, 928, 1160, 2320, 4523, 4640, 9046, 18092, 22615, 36184, 45230, 72368, 90460, 131167, 144736, 180920, 262334, 361840, 524668, 655835, 723680, 1049336, 1311670, 2098672, 2623340, 4197344, 5246680, 10493360, 20986720]

約数ペア:

[(1, 20986720), (2, 10493360), (4, 5246680), (5, 4197344), (8, 2623340), (10, 2098672), (16, 1311670), (20, 1049336), (29, 723680), (32, 655835), (40, 524668), (58, 361840), (80, 262334), (116, 180920), (145, 144736), (160, 131167), (232, 90460), (290, 72368), (464, 45230), (580, 36184), (928, 22615), (1160, 18092), (2320, 9046), (4523, 4640)]