21795152

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{79}}^1\times {\mathrm{401}}^1$

素因数の和:531

約数の個数: 40

約数和(自身を含む): 43866240

約数和(自身を除く): 22071088

約数列:

[1, 2, 4, 8, 16, 43, 79, 86, 158, 172, 316, 344, 401, 632, 688, 802, 1264, 1604, 3208, 3397, 6416, 6794, 13588, 17243, 27176, 31679, 34486, 54352, 63358, 68972, 126716, 137944, 253432, 275888, 506864, 1362197, 2724394, 5448788, 10897576, 21795152]

約数ペア:

[(1, 21795152), (2, 10897576), (4, 5448788), (8, 2724394), (16, 1362197), (43, 506864), (79, 275888), (86, 253432), (158, 137944), (172, 126716), (316, 68972), (344, 63358), (401, 54352), (632, 34486), (688, 31679), (802, 27176), (1264, 17243), (1604, 13588), (3208, 6794), (3397, 6416)]