19780635

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{59}}^1\times {\mathrm{103}}^1$

素因数の和:208

約数の個数: 64

約数和(自身を含む): 38338560

約数和(自身を除く): 18557925

約数列:

[1, 3, 5, 7, 15, 21, 31, 35, 59, 93, 103, 105, 155, 177, 217, 295, 309, 413, 465, 515, 651, 721, 885, 1085, 1239, 1545, 1829, 2065, 2163, 3193, 3255, 3605, 5487, 6077, 6195, 9145, 9579, 10815, 12803, 15965, 18231, 22351, 27435, 30385, 38409, 42539, 47895, 64015, 67053, 91155, 111755, 127617, 188387, 192045, 212695, 335265, 565161, 638085, 941935, 1318709, 2825805, 3956127, 6593545, 19780635]

約数ペア:

[(1, 19780635), (3, 6593545), (5, 3956127), (7, 2825805), (15, 1318709), (21, 941935), (31, 638085), (35, 565161), (59, 335265), (93, 212695), (103, 192045), (105, 188387), (155, 127617), (177, 111755), (217, 91155), (295, 67053), (309, 64015), (413, 47895), (465, 42539), (515, 38409), (651, 30385), (721, 27435), (885, 22351), (1085, 18231), (1239, 15965), (1545, 12803), (1829, 10815), (2065, 9579), (2163, 9145), (3193, 6195), (3255, 6077), (3605, 5487)]