389904640

素因数分解:

$2^8\times 5^1\times {\mathrm{419}}^1\times {\mathrm{727}}^1$

素因数の和:1167

約数の個数: 72

約数和(自身を含む): 937460160

約数和(自身を除く): 547555520

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 419, 640, 727, 838, 1280, 1454, 1676, 2095, 2908, 3352, 3635, 4190, 5816, 6704, 7270, 8380, 11632, 13408, 14540, 16760, 23264, 26816, 29080, 33520, 46528, 53632, 58160, 67040, 93056, 107264, 116320, 134080, 186112, 232640, 268160, 304613, 465280, 536320, 609226, 930560, 1218452, 1523065, 2436904, 3046130, 4873808, 6092260, 9747616, 12184520, 19495232, 24369040, 38990464, 48738080, 77980928, 97476160, 194952320, 389904640]

約数ペア:

[(1, 389904640), (2, 194952320), (4, 97476160), (5, 77980928), (8, 48738080), (10, 38990464), (16, 24369040), (20, 19495232), (32, 12184520), (40, 9747616), (64, 6092260), (80, 4873808), (128, 3046130), (160, 2436904), (256, 1523065), (320, 1218452), (419, 930560), (640, 609226), (727, 536320), (838, 465280), (1280, 304613), (1454, 268160), (1676, 232640), (2095, 186112), (2908, 134080), (3352, 116320), (3635, 107264), (4190, 93056), (5816, 67040), (6704, 58160), (7270, 53632), (8380, 46528), (11632, 33520), (13408, 29080), (14540, 26816), (16760, 23264)]