81335680

素因数分解:

$2^7\times 5^1\times {\mathrm{167}}^1\times {\mathrm{761}}^1$

素因数の和:947

約数の個数: 64

約数和(自身を含む): 195864480

約数和(自身を除く): 114528800

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 167, 320, 334, 640, 668, 761, 835, 1336, 1522, 1670, 2672, 3044, 3340, 3805, 5344, 6088, 6680, 7610, 10688, 12176, 13360, 15220, 21376, 24352, 26720, 30440, 48704, 53440, 60880, 97408, 106880, 121760, 127087, 243520, 254174, 487040, 508348, 635435, 1016696, 1270870, 2033392, 2541740, 4066784, 5083480, 8133568, 10166960, 16267136, 20333920, 40667840, 81335680]

約数ペア:

[(1, 81335680), (2, 40667840), (4, 20333920), (5, 16267136), (8, 10166960), (10, 8133568), (16, 5083480), (20, 4066784), (32, 2541740), (40, 2033392), (64, 1270870), (80, 1016696), (128, 635435), (160, 508348), (167, 487040), (320, 254174), (334, 243520), (640, 127087), (668, 121760), (761, 106880), (835, 97408), (1336, 60880), (1522, 53440), (1670, 48704), (2672, 30440), (3044, 26720), (3340, 24352), (3805, 21376), (5344, 15220), (6088, 13360), (6680, 12176), (7610, 10688)]