850720

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{409}}^1$

素因数の和:437

約数の個数: 48

約数和(自身を含む): 2169720

約数和(自身を除く): 1319000

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 65, 80, 104, 130, 160, 208, 260, 409, 416, 520, 818, 1040, 1636, 2045, 2080, 3272, 4090, 5317, 6544, 8180, 10634, 13088, 16360, 21268, 26585, 32720, 42536, 53170, 65440, 85072, 106340, 170144, 212680, 425360, 850720]

約数ペア:

[(1, 850720), (2, 425360), (4, 212680), (5, 170144), (8, 106340), (10, 85072), (13, 65440), (16, 53170), (20, 42536), (26, 32720), (32, 26585), (40, 21268), (52, 16360), (65, 13088), (80, 10634), (104, 8180), (130, 6544), (160, 5317), (208, 4090), (260, 3272), (409, 2080), (416, 2045), (520, 1636), (818, 1040)]