28842680

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{409}}^1$

素因数の和:504

約数の個数: 64

約数和(自身を含む): 68191200

約数和(自身を除く): 39348520

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 43, 82, 86, 164, 172, 205, 215, 328, 344, 409, 410, 430, 818, 820, 860, 1636, 1640, 1720, 1763, 2045, 3272, 3526, 4090, 7052, 8180, 8815, 14104, 16360, 16769, 17587, 17630, 33538, 35174, 35260, 67076, 70348, 70520, 83845, 87935, 134152, 140696, 167690, 175870, 335380, 351740, 670760, 703480, 721067, 1442134, 2884268, 3605335, 5768536, 7210670, 14421340, 28842680]

約数ペア:

[(1, 28842680), (2, 14421340), (4, 7210670), (5, 5768536), (8, 3605335), (10, 2884268), (20, 1442134), (40, 721067), (41, 703480), (43, 670760), (82, 351740), (86, 335380), (164, 175870), (172, 167690), (205, 140696), (215, 134152), (328, 87935), (344, 83845), (409, 70520), (410, 70348), (430, 67076), (818, 35260), (820, 35174), (860, 33538), (1636, 17630), (1640, 17587), (1720, 16769), (1763, 16360), (2045, 14104), (3272, 8815), (3526, 8180), (4090, 7052)]