18687978

素因数分解:

$2^1\times 3^2\times {\mathrm{31}}^1\times {\mathrm{107}}^1\times {\mathrm{313}}^1$

素因数の和:459

約数の個数: 48

約数和(自身を含む): 42322176

約数和(自身を除く): 23634198

約数列:

[1, 2, 3, 6, 9, 18, 31, 62, 93, 107, 186, 214, 279, 313, 321, 558, 626, 642, 939, 963, 1878, 1926, 2817, 3317, 5634, 6634, 9703, 9951, 19406, 19902, 29109, 29853, 33491, 58218, 59706, 66982, 87327, 100473, 174654, 200946, 301419, 602838, 1038221, 2076442, 3114663, 6229326, 9343989, 18687978]

約数ペア:

[(1, 18687978), (2, 9343989), (3, 6229326), (6, 3114663), (9, 2076442), (18, 1038221), (31, 602838), (62, 301419), (93, 200946), (107, 174654), (186, 100473), (214, 87327), (279, 66982), (313, 59706), (321, 58218), (558, 33491), (626, 29853), (642, 29109), (939, 19902), (963, 19406), (1878, 9951), (1926, 9703), (2817, 6634), (3317, 5634)]