20005965

素因数分解:

$3^2\times 5^1\times 7^2\times {\mathrm{43}}^1\times {\mathrm{211}}^1$

素因数の和:279

約数の個数: 72

約数和(自身を含む): 41472288

約数和(自身を除く): 21466323

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 43, 45, 49, 63, 105, 129, 147, 211, 215, 245, 301, 315, 387, 441, 633, 645, 735, 903, 1055, 1477, 1505, 1899, 1935, 2107, 2205, 2709, 3165, 4431, 4515, 6321, 7385, 9073, 9495, 10339, 10535, 13293, 13545, 18963, 22155, 27219, 31017, 31605, 45365, 51695, 63511, 66465, 81657, 93051, 94815, 136095, 155085, 190533, 317555, 408285, 444577, 465255, 571599, 952665, 1333731, 2222885, 2857995, 4001193, 6668655, 20005965]

約数ペア:

[(1, 20005965), (3, 6668655), (5, 4001193), (7, 2857995), (9, 2222885), (15, 1333731), (21, 952665), (35, 571599), (43, 465255), (45, 444577), (49, 408285), (63, 317555), (105, 190533), (129, 155085), (147, 136095), (211, 94815), (215, 93051), (245, 81657), (301, 66465), (315, 63511), (387, 51695), (441, 45365), (633, 31605), (645, 31017), (735, 27219), (903, 22155), (1055, 18963), (1477, 13545), (1505, 13293), (1899, 10535), (1935, 10339), (2107, 9495), (2205, 9073), (2709, 7385), (3165, 6321), (4431, 4515)]