21805220

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{59}}^1\times {\mathrm{1087}}^1$

素因数の和:1172

約数の個数: 48

約数和(自身を含む): 49351680

約数和(自身を除く): 27546460

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 59, 68, 85, 118, 170, 236, 295, 340, 590, 1003, 1087, 1180, 2006, 2174, 4012, 4348, 5015, 5435, 10030, 10870, 18479, 20060, 21740, 36958, 64133, 73916, 92395, 128266, 184790, 256532, 320665, 369580, 641330, 1090261, 1282660, 2180522, 4361044, 5451305, 10902610, 21805220]

約数ペア:

[(1, 21805220), (2, 10902610), (4, 5451305), (5, 4361044), (10, 2180522), (17, 1282660), (20, 1090261), (34, 641330), (59, 369580), (68, 320665), (85, 256532), (118, 184790), (170, 128266), (236, 92395), (295, 73916), (340, 64133), (590, 36958), (1003, 21740), (1087, 20060), (1180, 18479), (2006, 10870), (2174, 10030), (4012, 5435), (4348, 5015)]