20766291

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{61}}^1$

素因数の和:156

約数の個数: 64

約数和(自身を含む): 36664320

約数和(自身を除く): 15898029

約数列:

[1, 3, 7, 13, 21, 29, 39, 43, 61, 87, 91, 129, 183, 203, 273, 301, 377, 427, 559, 609, 793, 903, 1131, 1247, 1281, 1677, 1769, 2379, 2623, 2639, 3741, 3913, 5307, 5551, 7869, 7917, 8729, 11739, 12383, 16211, 16653, 18361, 22997, 26187, 34099, 37149, 48633, 55083, 68991, 76067, 102297, 113477, 160979, 228201, 238693, 340431, 482937, 532469, 716079, 988871, 1597407, 2966613, 6922097, 20766291]

約数ペア:

[(1, 20766291), (3, 6922097), (7, 2966613), (13, 1597407), (21, 988871), (29, 716079), (39, 532469), (43, 482937), (61, 340431), (87, 238693), (91, 228201), (129, 160979), (183, 113477), (203, 102297), (273, 76067), (301, 68991), (377, 55083), (427, 48633), (559, 37149), (609, 34099), (793, 26187), (903, 22997), (1131, 18361), (1247, 16653), (1281, 16211), (1677, 12383), (1769, 11739), (2379, 8729), (2623, 7917), (2639, 7869), (3741, 5551), (3913, 5307)]