21515165

素因数分解:

$5^1\times 7^2\times {\mathrm{137}}^1\times {\mathrm{641}}^1$

素因数の和:797

約数の個数: 24

約数和(自身を含む): 30299832

約数和(自身を除く): 8784667

約数列:

[1, 5, 7, 35, 49, 137, 245, 641, 685, 959, 3205, 4487, 4795, 6713, 22435, 31409, 33565, 87817, 157045, 439085, 614719, 3073595, 4303033, 21515165]

約数ペア:

[(1, 21515165), (5, 4303033), (7, 3073595), (35, 614719), (49, 439085), (137, 157045), (245, 87817), (641, 33565), (685, 31409), (959, 22435), (3205, 6713), (4487, 4795)]