28540720

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^2\times {\mathrm{2111}}^1$

素因数の和:2150

約数の個数: 60

約数和(自身を含む): 71888256

約数和(自身を除く): 43347536

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 169, 208, 260, 338, 520, 676, 845, 1040, 1352, 1690, 2111, 2704, 3380, 4222, 6760, 8444, 10555, 13520, 16888, 21110, 27443, 33776, 42220, 54886, 84440, 109772, 137215, 168880, 219544, 274430, 356759, 439088, 548860, 713518, 1097720, 1427036, 1783795, 2195440, 2854072, 3567590, 5708144, 7135180, 14270360, 28540720]

約数ペア:

[(1, 28540720), (2, 14270360), (4, 7135180), (5, 5708144), (8, 3567590), (10, 2854072), (13, 2195440), (16, 1783795), (20, 1427036), (26, 1097720), (40, 713518), (52, 548860), (65, 439088), (80, 356759), (104, 274430), (130, 219544), (169, 168880), (208, 137215), (260, 109772), (338, 84440), (520, 54886), (676, 42220), (845, 33776), (1040, 27443), (1352, 21110), (1690, 16888), (2111, 13520), (2704, 10555), (3380, 8444), (4222, 6760)]