19910907

素因数分解:

$3^3\times {\mathrm{29}}^1\times {\mathrm{59}}^1\times {\mathrm{431}}^1$

素因数の和:528

約数の個数: 32

約数和(自身を含む): 31104000

約数和(自身を除く): 11193093

約数列:

[1, 3, 9, 27, 29, 59, 87, 177, 261, 431, 531, 783, 1293, 1593, 1711, 3879, 5133, 11637, 12499, 15399, 25429, 37497, 46197, 76287, 112491, 228861, 337473, 686583, 737441, 2212323, 6636969, 19910907]

約数ペア:

[(1, 19910907), (3, 6636969), (9, 2212323), (27, 737441), (29, 686583), (59, 337473), (87, 228861), (177, 112491), (261, 76287), (431, 46197), (531, 37497), (783, 25429), (1293, 15399), (1593, 12499), (1711, 11637), (3879, 5133)]