18839560

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{109}}^1\times {\mathrm{149}}^1$

素因数の和:298

約数の個数: 64

約数和(自身を含む): 44550000

約数和(自身を除く): 25710440

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 40, 58, 109, 116, 145, 149, 218, 232, 290, 298, 436, 545, 580, 596, 745, 872, 1090, 1160, 1192, 1490, 2180, 2980, 3161, 4321, 4360, 5960, 6322, 8642, 12644, 15805, 16241, 17284, 21605, 25288, 31610, 32482, 34568, 43210, 63220, 64964, 81205, 86420, 126440, 129928, 162410, 172840, 324820, 470989, 649640, 941978, 1883956, 2354945, 3767912, 4709890, 9419780, 18839560]

約数ペア:

[(1, 18839560), (2, 9419780), (4, 4709890), (5, 3767912), (8, 2354945), (10, 1883956), (20, 941978), (29, 649640), (40, 470989), (58, 324820), (109, 172840), (116, 162410), (145, 129928), (149, 126440), (218, 86420), (232, 81205), (290, 64964), (298, 63220), (436, 43210), (545, 34568), (580, 32482), (596, 31610), (745, 25288), (872, 21605), (1090, 17284), (1160, 16241), (1192, 15805), (1490, 12644), (2180, 8642), (2980, 6322), (3161, 5960), (4321, 4360)]