19780222

素因数分解:

$2^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{59}}^1\times {\mathrm{311}}^1$

素因数の和:397

約数の個数: 48

約数和(自身を含む): 38413440

約数和(自身を除く): 18633218

約数列:

[1, 2, 7, 11, 14, 22, 49, 59, 77, 98, 118, 154, 311, 413, 539, 622, 649, 826, 1078, 1298, 2177, 2891, 3421, 4354, 4543, 5782, 6842, 9086, 15239, 18349, 23947, 30478, 31801, 36698, 47894, 63602, 128443, 167629, 201839, 256886, 335258, 403678, 899101, 1412873, 1798202, 2825746, 9890111, 19780222]

約数ペア:

[(1, 19780222), (2, 9890111), (7, 2825746), (11, 1798202), (14, 1412873), (22, 899101), (49, 403678), (59, 335258), (77, 256886), (98, 201839), (118, 167629), (154, 128443), (311, 63602), (413, 47894), (539, 36698), (622, 31801), (649, 30478), (826, 23947), (1078, 18349), (1298, 15239), (2177, 9086), (2891, 6842), (3421, 5782), (4354, 4543)]