21091278

素因数分解:

$2^1\times 3^1\times {\mathrm{13}}^1\times {\mathrm{317}}^1\times {\mathrm{853}}^1$

素因数の和:1188

約数の個数: 32

約数和(自身を含む): 45624096

約数和(自身を除く): 24532818

約数列:

[1, 2, 3, 6, 13, 26, 39, 78, 317, 634, 853, 951, 1706, 1902, 2559, 4121, 5118, 8242, 11089, 12363, 22178, 24726, 33267, 66534, 270401, 540802, 811203, 1622406, 3515213, 7030426, 10545639, 21091278]

約数ペア:

[(1, 21091278), (2, 10545639), (3, 7030426), (6, 3515213), (13, 1622406), (26, 811203), (39, 540802), (78, 270401), (317, 66534), (634, 33267), (853, 24726), (951, 22178), (1706, 12363), (1902, 11089), (2559, 8242), (4121, 5118)]