20666490

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{2789}}^1$

素因数の和:2831

約数の個数: 64

約数和(自身を含む): 56246400

約数和(自身を除く): 35579910

約数列:

[1, 2, 3, 5, 6, 10, 13, 15, 19, 26, 30, 38, 39, 57, 65, 78, 95, 114, 130, 190, 195, 247, 285, 390, 494, 570, 741, 1235, 1482, 2470, 2789, 3705, 5578, 7410, 8367, 13945, 16734, 27890, 36257, 41835, 52991, 72514, 83670, 105982, 108771, 158973, 181285, 217542, 264955, 317946, 362570, 529910, 543855, 688883, 794865, 1087710, 1377766, 1589730, 2066649, 3444415, 4133298, 6888830, 10333245, 20666490]

約数ペア:

[(1, 20666490), (2, 10333245), (3, 6888830), (5, 4133298), (6, 3444415), (10, 2066649), (13, 1589730), (15, 1377766), (19, 1087710), (26, 794865), (30, 688883), (38, 543855), (39, 529910), (57, 362570), (65, 317946), (78, 264955), (95, 217542), (114, 181285), (130, 158973), (190, 108771), (195, 105982), (247, 83670), (285, 72514), (390, 52991), (494, 41835), (570, 36257), (741, 27890), (1235, 16734), (1482, 13945), (2470, 8367), (2789, 7410), (3705, 5578)]