20778849

素因数分解:

$3^4\times 7^1\times {\mathrm{13}}^1\times {\mathrm{2819}}^1$

素因数の和:2851

約数の個数: 40

約数和(自身を含む): 38216640

約数和(自身を除く): 17437791

約数列:

[1, 3, 7, 9, 13, 21, 27, 39, 63, 81, 91, 117, 189, 273, 351, 567, 819, 1053, 2457, 2819, 7371, 8457, 19733, 25371, 36647, 59199, 76113, 109941, 177597, 228339, 256529, 329823, 532791, 769587, 989469, 1598373, 2308761, 2968407, 6926283, 20778849]

約数ペア:

[(1, 20778849), (3, 6926283), (7, 2968407), (9, 2308761), (13, 1598373), (21, 989469), (27, 769587), (39, 532791), (63, 329823), (81, 256529), (91, 228339), (117, 177597), (189, 109941), (273, 76113), (351, 59199), (567, 36647), (819, 25371), (1053, 19733), (2457, 8457), (2819, 7371)]