20694640

素因数分解:

$2^4\times 5^1\times {\mathrm{167}}^1\times {\mathrm{1549}}^1$

素因数の和:1729

約数の個数: 40

約数和(自身を含む): 48434400

約数和(自身を除く): 27739760

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 167, 334, 668, 835, 1336, 1549, 1670, 2672, 3098, 3340, 6196, 6680, 7745, 12392, 13360, 15490, 24784, 30980, 61960, 123920, 258683, 517366, 1034732, 1293415, 2069464, 2586830, 4138928, 5173660, 10347320, 20694640]

約数ペア:

[(1, 20694640), (2, 10347320), (4, 5173660), (5, 4138928), (8, 2586830), (10, 2069464), (16, 1293415), (20, 1034732), (40, 517366), (80, 258683), (167, 123920), (334, 61960), (668, 30980), (835, 24784), (1336, 15490), (1549, 13360), (1670, 12392), (2672, 7745), (3098, 6680), (3340, 6196)]