20685555

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{29}}^1\times {\mathrm{131}}^1$

素因数の和:193

約数の個数: 72

約数和(自身を含む): 41081040

約数和(自身を除く): 20395485

約数列:

[1, 3, 5, 9, 11, 15, 29, 33, 45, 55, 87, 99, 121, 131, 145, 165, 261, 319, 363, 393, 435, 495, 605, 655, 957, 1089, 1179, 1305, 1441, 1595, 1815, 1965, 2871, 3509, 3799, 4323, 4785, 5445, 5895, 7205, 10527, 11397, 12969, 14355, 15851, 17545, 18995, 21615, 31581, 34191, 41789, 47553, 52635, 56985, 64845, 79255, 125367, 142659, 157905, 170955, 208945, 237765, 376101, 459679, 626835, 713295, 1379037, 1880505, 2298395, 4137111, 6895185, 20685555]

約数ペア:

[(1, 20685555), (3, 6895185), (5, 4137111), (9, 2298395), (11, 1880505), (15, 1379037), (29, 713295), (33, 626835), (45, 459679), (55, 376101), (87, 237765), (99, 208945), (121, 170955), (131, 157905), (145, 142659), (165, 125367), (261, 79255), (319, 64845), (363, 56985), (393, 52635), (435, 47553), (495, 41789), (605, 34191), (655, 31581), (957, 21615), (1089, 18995), (1179, 17545), (1305, 15851), (1441, 14355), (1595, 12969), (1815, 11397), (1965, 10527), (2871, 7205), (3509, 5895), (3799, 5445), (4323, 4785)]