20685328

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{113}}^1\times {\mathrm{673}}^1$

素因数の和:811

約数の個数: 40

約数和(自身を含む): 42874488

約数和(自身を除く): 22189160

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 113, 136, 226, 272, 452, 673, 904, 1346, 1808, 1921, 2692, 3842, 5384, 7684, 10768, 11441, 15368, 22882, 30736, 45764, 76049, 91528, 152098, 183056, 304196, 608392, 1216784, 1292833, 2585666, 5171332, 10342664, 20685328]

約数ペア:

[(1, 20685328), (2, 10342664), (4, 5171332), (8, 2585666), (16, 1292833), (17, 1216784), (34, 608392), (68, 304196), (113, 183056), (136, 152098), (226, 91528), (272, 76049), (452, 45764), (673, 30736), (904, 22882), (1346, 15368), (1808, 11441), (1921, 10768), (2692, 7684), (3842, 5384)]