21496240

素因数分解:

$2^4\times 5^1\times {\mathrm{167}}^1\times {\mathrm{1609}}^1$

素因数の和:1789

約数の個数: 40

約数和(自身を含む): 50309280

約数和(自身を除く): 28813040

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 167, 334, 668, 835, 1336, 1609, 1670, 2672, 3218, 3340, 6436, 6680, 8045, 12872, 13360, 16090, 25744, 32180, 64360, 128720, 268703, 537406, 1074812, 1343515, 2149624, 2687030, 4299248, 5374060, 10748120, 21496240]

約数ペア:

[(1, 21496240), (2, 10748120), (4, 5374060), (5, 4299248), (8, 2687030), (10, 2149624), (16, 1343515), (20, 1074812), (40, 537406), (80, 268703), (167, 128720), (334, 64360), (668, 32180), (835, 25744), (1336, 16090), (1609, 13360), (1670, 12872), (2672, 8045), (3218, 6680), (3340, 6436)]