21990495

素因数分解:

$3^1\times 5^1\times {\mathrm{53}}^1\times {\mathrm{139}}^1\times {\mathrm{199}}^1$

素因数の和:399

約数の個数: 32

約数和(自身を含む): 36288000

約数和(自身を除く): 14297505

約数列:

[1, 3, 5, 15, 53, 139, 159, 199, 265, 417, 597, 695, 795, 995, 2085, 2985, 7367, 10547, 22101, 27661, 31641, 36835, 52735, 82983, 110505, 138305, 158205, 414915, 1466033, 4398099, 7330165, 21990495]

約数ペア:

[(1, 21990495), (3, 7330165), (5, 4398099), (15, 1466033), (53, 414915), (139, 158205), (159, 138305), (199, 110505), (265, 82983), (417, 52735), (597, 36835), (695, 31641), (795, 27661), (995, 22101), (2085, 10547), (2985, 7367)]