21000873747

素因数分解:

$3^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{1123}}^1\times {\mathrm{18947}}^1$

素因数の和:20127

約数の個数: 32

約数和(自身を含む): 32713039872

約数和(自身を除く): 11712166125

約数列:

[1, 3, 7, 21, 47, 141, 329, 987, 1123, 3369, 7861, 18947, 23583, 52781, 56841, 132629, 158343, 369467, 397887, 890509, 1108401, 2671527, 6233563, 18700689, 21277481, 63832443, 148942367, 446827101, 1000041607, 3000124821, 7000291249, 21000873747]

約数ペア:

[(1, 21000873747), (3, 7000291249), (7, 3000124821), (21, 1000041607), (47, 446827101), (141, 148942367), (329, 63832443), (987, 21277481), (1123, 18700689), (3369, 6233563), (7861, 2671527), (18947, 1108401), (23583, 890509), (52781, 397887), (56841, 369467), (132629, 158343)]