217406720

素因数分解:

$2^8\times 5^1\times {\mathrm{31}}^1\times {\mathrm{5479}}^1$

素因数の和:5531

約数の個数: 72

約数和(自身を含む): 537653760

約数和(自身を除く): 320247040

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 80, 124, 128, 155, 160, 248, 256, 310, 320, 496, 620, 640, 992, 1240, 1280, 1984, 2480, 3968, 4960, 5479, 7936, 9920, 10958, 19840, 21916, 27395, 39680, 43832, 54790, 87664, 109580, 169849, 175328, 219160, 339698, 350656, 438320, 679396, 701312, 849245, 876640, 1358792, 1402624, 1698490, 1753280, 2717584, 3396980, 3506560, 5435168, 6793960, 7013120, 10870336, 13587920, 21740672, 27175840, 43481344, 54351680, 108703360, 217406720]

約数ペア:

[(1, 217406720), (2, 108703360), (4, 54351680), (5, 43481344), (8, 27175840), (10, 21740672), (16, 13587920), (20, 10870336), (31, 7013120), (32, 6793960), (40, 5435168), (62, 3506560), (64, 3396980), (80, 2717584), (124, 1753280), (128, 1698490), (155, 1402624), (160, 1358792), (248, 876640), (256, 849245), (310, 701312), (320, 679396), (496, 438320), (620, 350656), (640, 339698), (992, 219160), (1240, 175328), (1280, 169849), (1984, 109580), (2480, 87664), (3968, 54790), (4960, 43832), (5479, 39680), (7936, 27395), (9920, 21916), (10958, 19840)]