25920640

素因数分解:

$2^7\times 5^1\times {\mathrm{101}}^1\times {\mathrm{401}}^1$

素因数の和:521

約数の個数: 64

約数和(自身を含む): 62736120

約数和(自身を除く): 36815480

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 101, 128, 160, 202, 320, 401, 404, 505, 640, 802, 808, 1010, 1604, 1616, 2005, 2020, 3208, 3232, 4010, 4040, 6416, 6464, 8020, 8080, 12832, 12928, 16040, 16160, 25664, 32080, 32320, 40501, 51328, 64160, 64640, 81002, 128320, 162004, 202505, 256640, 324008, 405010, 648016, 810020, 1296032, 1620040, 2592064, 3240080, 5184128, 6480160, 12960320, 25920640]

約数ペア:

[(1, 25920640), (2, 12960320), (4, 6480160), (5, 5184128), (8, 3240080), (10, 2592064), (16, 1620040), (20, 1296032), (32, 810020), (40, 648016), (64, 405010), (80, 324008), (101, 256640), (128, 202505), (160, 162004), (202, 128320), (320, 81002), (401, 64640), (404, 64160), (505, 51328), (640, 40501), (802, 32320), (808, 32080), (1010, 25664), (1604, 16160), (1616, 16040), (2005, 12928), (2020, 12832), (3208, 8080), (3232, 8020), (4010, 6464), (4040, 6416)]