20664644

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^2\times {\mathrm{397}}^1$

素因数の和:445

約数の個数: 72

約数和(自身を含む): 48944448

約数和(自身を除く): 28279804

約数列:

[1, 2, 4, 7, 11, 13, 14, 22, 26, 28, 44, 52, 77, 91, 143, 154, 169, 182, 286, 308, 338, 364, 397, 572, 676, 794, 1001, 1183, 1588, 1859, 2002, 2366, 2779, 3718, 4004, 4367, 4732, 5161, 5558, 7436, 8734, 10322, 11116, 13013, 17468, 20644, 26026, 30569, 36127, 52052, 56771, 61138, 67093, 72254, 113542, 122276, 134186, 144508, 227084, 268372, 397397, 469651, 738023, 794794, 939302, 1476046, 1589588, 1878604, 2952092, 5166161, 10332322, 20664644]

約数ペア:

[(1, 20664644), (2, 10332322), (4, 5166161), (7, 2952092), (11, 1878604), (13, 1589588), (14, 1476046), (22, 939302), (26, 794794), (28, 738023), (44, 469651), (52, 397397), (77, 268372), (91, 227084), (143, 144508), (154, 134186), (169, 122276), (182, 113542), (286, 72254), (308, 67093), (338, 61138), (364, 56771), (397, 52052), (572, 36127), (676, 30569), (794, 26026), (1001, 20644), (1183, 17468), (1588, 13013), (1859, 11116), (2002, 10322), (2366, 8734), (2779, 7436), (3718, 5558), (4004, 5161), (4367, 4732)]