20464160

素因数分解:

$2^5\times 5^1\times {\mathrm{79}}^1\times {\mathrm{1619}}^1$

素因数の和:1713

約数の個数: 48

約数和(自身を含む): 48988800

約数和(自身を除く): 28524640

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 79, 80, 158, 160, 316, 395, 632, 790, 1264, 1580, 1619, 2528, 3160, 3238, 6320, 6476, 8095, 12640, 12952, 16190, 25904, 32380, 51808, 64760, 127901, 129520, 255802, 259040, 511604, 639505, 1023208, 1279010, 2046416, 2558020, 4092832, 5116040, 10232080, 20464160]

約数ペア:

[(1, 20464160), (2, 10232080), (4, 5116040), (5, 4092832), (8, 2558020), (10, 2046416), (16, 1279010), (20, 1023208), (32, 639505), (40, 511604), (79, 259040), (80, 255802), (158, 129520), (160, 127901), (316, 64760), (395, 51808), (632, 32380), (790, 25904), (1264, 16190), (1580, 12952), (1619, 12640), (2528, 8095), (3160, 6476), (3238, 6320)]