20321478

素因数分解:

$2^1\times 3^2\times {\mathrm{71}}^1\times {\mathrm{15901}}^1$

素因数の和:15980

約数の個数: 24

約数和(自身を含む): 44652816

約数和(自身を除く): 24331338

約数列:

[1, 2, 3, 6, 9, 18, 71, 142, 213, 426, 639, 1278, 15901, 31802, 47703, 95406, 143109, 286218, 1128971, 2257942, 3386913, 6773826, 10160739, 20321478]

約数ペア:

[(1, 20321478), (2, 10160739), (3, 6773826), (6, 3386913), (9, 2257942), (18, 1128971), (71, 286218), (142, 143109), (213, 95406), (426, 47703), (639, 31802), (1278, 15901)]