16818080

素因数分解:

$2^5\times 5^1\times {\mathrm{257}}^1\times {\mathrm{409}}^1$

素因数の和:681

約数の個数: 48

約数和(自身を含む): 39984840

約数和(自身を除く): 23166760

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 257, 409, 514, 818, 1028, 1285, 1636, 2045, 2056, 2570, 3272, 4090, 4112, 5140, 6544, 8180, 8224, 10280, 13088, 16360, 20560, 32720, 41120, 65440, 105113, 210226, 420452, 525565, 840904, 1051130, 1681808, 2102260, 3363616, 4204520, 8409040, 16818080]

約数ペア:

[(1, 16818080), (2, 8409040), (4, 4204520), (5, 3363616), (8, 2102260), (10, 1681808), (16, 1051130), (20, 840904), (32, 525565), (40, 420452), (80, 210226), (160, 105113), (257, 65440), (409, 41120), (514, 32720), (818, 20560), (1028, 16360), (1285, 13088), (1636, 10280), (2045, 8224), (2056, 8180), (2570, 6544), (3272, 5140), (4090, 4112)]