21698020

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{47}}^1\times {\mathrm{563}}^1$

素因数の和:660

約数の個数: 48

約数和(自身を含む): 47755008

約数和(自身を除く): 26056988

約数列:

[1, 2, 4, 5, 10, 20, 41, 47, 82, 94, 164, 188, 205, 235, 410, 470, 563, 820, 940, 1126, 1927, 2252, 2815, 3854, 5630, 7708, 9635, 11260, 19270, 23083, 26461, 38540, 46166, 52922, 92332, 105844, 115415, 132305, 230830, 264610, 461660, 529220, 1084901, 2169802, 4339604, 5424505, 10849010, 21698020]

約数ペア:

[(1, 21698020), (2, 10849010), (4, 5424505), (5, 4339604), (10, 2169802), (20, 1084901), (41, 529220), (47, 461660), (82, 264610), (94, 230830), (164, 132305), (188, 115415), (205, 105844), (235, 92332), (410, 52922), (470, 46166), (563, 38540), (820, 26461), (940, 23083), (1126, 19270), (1927, 11260), (2252, 9635), (2815, 7708), (3854, 5630)]