21180764

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{59}}^1\times {\mathrm{199}}^1$

素因数の和:314

約数の個数: 48

約数和(自身を含む): 42336000

約数和(自身を除く): 21155236

約数列:

[1, 2, 4, 11, 22, 41, 44, 59, 82, 118, 164, 199, 236, 398, 451, 649, 796, 902, 1298, 1804, 2189, 2419, 2596, 4378, 4838, 8159, 8756, 9676, 11741, 16318, 23482, 26609, 32636, 46964, 53218, 89749, 106436, 129151, 179498, 258302, 358996, 481381, 516604, 962762, 1925524, 5295191, 10590382, 21180764]

約数ペア:

[(1, 21180764), (2, 10590382), (4, 5295191), (11, 1925524), (22, 962762), (41, 516604), (44, 481381), (59, 358996), (82, 258302), (118, 179498), (164, 129151), (199, 106436), (236, 89749), (398, 53218), (451, 46964), (649, 32636), (796, 26609), (902, 23482), (1298, 16318), (1804, 11741), (2189, 9676), (2419, 8756), (2596, 8159), (4378, 4838)]