81711890

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{421}}^1\times {\mathrm{1493}}^1$

素因数の和:1934

約数の個数: 32

約数和(自身を含む): 158877936

約数和(自身を除く): 77166046

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 421, 842, 1493, 2105, 2986, 4210, 5473, 7465, 10946, 14930, 19409, 27365, 38818, 54730, 97045, 194090, 628553, 1257106, 3142765, 6285530, 8171189, 16342378, 40855945, 81711890]

約数ペア:

[(1, 81711890), (2, 40855945), (5, 16342378), (10, 8171189), (13, 6285530), (26, 3142765), (65, 1257106), (130, 628553), (421, 194090), (842, 97045), (1493, 54730), (2105, 38818), (2986, 27365), (4210, 19409), (5473, 14930), (7465, 10946)]