20553687

素因数分解:

$3^2\times 7^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{223}}^1$

素因数の和:273

約数の個数: 72

約数和(自身を含む): 39836160

約数和(自身を除く): 19282473

約数列:

[1, 3, 7, 9, 11, 19, 21, 33, 49, 57, 63, 77, 99, 133, 147, 171, 209, 223, 231, 399, 441, 539, 627, 669, 693, 931, 1197, 1463, 1561, 1617, 1881, 2007, 2453, 2793, 4237, 4389, 4683, 4851, 7359, 8379, 10241, 10927, 12711, 13167, 14049, 17171, 22077, 29659, 30723, 32781, 38133, 46607, 51513, 88977, 92169, 98343, 120197, 139821, 154539, 207613, 266931, 326249, 360591, 419463, 622839, 978747, 1081773, 1868517, 2283743, 2936241, 6851229, 20553687]

約数ペア:

[(1, 20553687), (3, 6851229), (7, 2936241), (9, 2283743), (11, 1868517), (19, 1081773), (21, 978747), (33, 622839), (49, 419463), (57, 360591), (63, 326249), (77, 266931), (99, 207613), (133, 154539), (147, 139821), (171, 120197), (209, 98343), (223, 92169), (231, 88977), (399, 51513), (441, 46607), (539, 38133), (627, 32781), (669, 30723), (693, 29659), (931, 22077), (1197, 17171), (1463, 14049), (1561, 13167), (1617, 12711), (1881, 10927), (2007, 10241), (2453, 8379), (2793, 7359), (4237, 4851), (4389, 4683)]