21687965

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{89}}^1\times {\mathrm{163}}^1$

素因数の和:293

約数の個数: 32

約数和(自身を含む): 29756160

約数和(自身を除く): 8068195

約数列:

[1, 5, 13, 23, 65, 89, 115, 163, 299, 445, 815, 1157, 1495, 2047, 2119, 3749, 5785, 10235, 10595, 14507, 18745, 26611, 48737, 72535, 133055, 188591, 243685, 333661, 942955, 1668305, 4337593, 21687965]

約数ペア:

[(1, 21687965), (5, 4337593), (13, 1668305), (23, 942955), (65, 333661), (89, 243685), (115, 188591), (163, 133055), (299, 72535), (445, 48737), (815, 26611), (1157, 18745), (1495, 14507), (2047, 10595), (2119, 10235), (3749, 5785)]