21297718

素因数分解:

$2^1\times {\mathrm{13}}^3\times {\mathrm{37}}^1\times {\mathrm{131}}^1$

素因数の和:209

約数の個数: 32

約数和(自身を含む): 35814240

約数和(自身を除く): 14516522

約数列:

[1, 2, 13, 26, 37, 74, 131, 169, 262, 338, 481, 962, 1703, 2197, 3406, 4394, 4847, 6253, 9694, 12506, 22139, 44278, 63011, 81289, 126022, 162578, 287807, 575614, 819143, 1638286, 10648859, 21297718]

約数ペア:

[(1, 21297718), (2, 10648859), (13, 1638286), (26, 819143), (37, 575614), (74, 287807), (131, 162578), (169, 126022), (262, 81289), (338, 63011), (481, 44278), (962, 22139), (1703, 12506), (2197, 9694), (3406, 6253), (4394, 4847)]