21979948

素因数分解:

$2^2\times {\mathrm{53}}^1\times {\mathrm{199}}^1\times {\mathrm{521}}^1$

素因数の和:777

約数の個数: 24

約数和(自身を含む): 39463200

約数和(自身を除く): 17483252

約数列:

[1, 2, 4, 53, 106, 199, 212, 398, 521, 796, 1042, 2084, 10547, 21094, 27613, 42188, 55226, 103679, 110452, 207358, 414716, 5494987, 10989974, 21979948]

約数ペア:

[(1, 21979948), (2, 10989974), (4, 5494987), (53, 414716), (106, 207358), (199, 110452), (212, 103679), (398, 55226), (521, 42188), (796, 27613), (1042, 21094), (2084, 10547)]