21006987188

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{31}}^2\times {\mathrm{263}}^1\times {\mathrm{1889}}^1$

素因数の和:2229

約数の個数: 72

約数和(自身を含む): 41619251520

約数和(自身を除く): 20612264332

約数列:

[1, 2, 4, 11, 22, 31, 44, 62, 124, 263, 341, 526, 682, 961, 1052, 1364, 1889, 1922, 2893, 3778, 3844, 5786, 7556, 8153, 10571, 11572, 16306, 20779, 21142, 32612, 41558, 42284, 58559, 83116, 89683, 117118, 179366, 234236, 252743, 358732, 496807, 505486, 644149, 993614, 1010972, 1288298, 1815329, 1987228, 2576596, 2780173, 3630658, 5464877, 5560346, 7261316, 10929754, 11120692, 15401017, 19968619, 21859508, 30802034, 39937238, 61604068, 79874476, 169411187, 338822374, 477431527, 677644748, 954863054, 1909726108, 5251746797, 10503493594, 21006987188]

約数ペア:

[(1, 21006987188), (2, 10503493594), (4, 5251746797), (11, 1909726108), (22, 954863054), (31, 677644748), (44, 477431527), (62, 338822374), (124, 169411187), (263, 79874476), (341, 61604068), (526, 39937238), (682, 30802034), (961, 21859508), (1052, 19968619), (1364, 15401017), (1889, 11120692), (1922, 10929754), (2893, 7261316), (3778, 5560346), (3844, 5464877), (5786, 3630658), (7556, 2780173), (8153, 2576596), (10571, 1987228), (11572, 1815329), (16306, 1288298), (20779, 1010972), (21142, 993614), (32612, 644149), (41558, 505486), (42284, 496807), (58559, 358732), (83116, 252743), (89683, 234236), (117118, 179366)]