28288520

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{54401}}^1$

素因数の和:54425

約数の個数: 32

約数和(自身を含む): 68546520

約数和(自身を除く): 40258000

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 54401, 108802, 217604, 272005, 435208, 544010, 707213, 1088020, 1414426, 2176040, 2828852, 3536065, 5657704, 7072130, 14144260, 28288520]

約数ペア:

[(1, 28288520), (2, 14144260), (4, 7072130), (5, 5657704), (8, 3536065), (10, 2828852), (13, 2176040), (20, 1414426), (26, 1088020), (40, 707213), (52, 544010), (65, 435208), (104, 272005), (130, 217604), (260, 108802), (520, 54401)]