28756720

素因数分解:

$2^4\times 5^1\times {\mathrm{101}}^1\times {\mathrm{3559}}^1$

素因数の和:3673

約数の個数: 40

約数和(自身を含む): 67540320

約数和(自身を除く): 38783600

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 101, 202, 404, 505, 808, 1010, 1616, 2020, 3559, 4040, 7118, 8080, 14236, 17795, 28472, 35590, 56944, 71180, 142360, 284720, 359459, 718918, 1437836, 1797295, 2875672, 3594590, 5751344, 7189180, 14378360, 28756720]

約数ペア:

[(1, 28756720), (2, 14378360), (4, 7189180), (5, 5751344), (8, 3594590), (10, 2875672), (16, 1797295), (20, 1437836), (40, 718918), (80, 359459), (101, 284720), (202, 142360), (404, 71180), (505, 56944), (808, 35590), (1010, 28472), (1616, 17795), (2020, 14236), (3559, 8080), (4040, 7118)]