20787585

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{97}}^1\times {\mathrm{157}}^1$

素因数の和:282

約数の個数: 64

約数和(自身を含む): 41620992

約数和(自身を除く): 20833407

約数列:

[1, 3, 5, 7, 13, 15, 21, 35, 39, 65, 91, 97, 105, 157, 195, 273, 291, 455, 471, 485, 679, 785, 1099, 1261, 1365, 1455, 2037, 2041, 2355, 3297, 3395, 3783, 5495, 6123, 6305, 8827, 10185, 10205, 14287, 15229, 16485, 18915, 26481, 30615, 42861, 44135, 45687, 71435, 76145, 106603, 132405, 197977, 214305, 228435, 319809, 533015, 593931, 989885, 1385839, 1599045, 2969655, 4157517, 6929195, 20787585]

約数ペア:

[(1, 20787585), (3, 6929195), (5, 4157517), (7, 2969655), (13, 1599045), (15, 1385839), (21, 989885), (35, 593931), (39, 533015), (65, 319809), (91, 228435), (97, 214305), (105, 197977), (157, 132405), (195, 106603), (273, 76145), (291, 71435), (455, 45687), (471, 44135), (485, 42861), (679, 30615), (785, 26481), (1099, 18915), (1261, 16485), (1365, 15229), (1455, 14287), (2037, 10205), (2041, 10185), (2355, 8827), (3297, 6305), (3395, 6123), (3783, 5495)]