721839357

素因数分解:

$3^4\times {\mathrm{571}}^1\times {\mathrm{15607}}^1$

素因数の和:16190

約数の個数: 20

約数和(自身を含む): 1080260896

約数和(自身を除く): 358421539

約数列:

[1, 3, 9, 27, 81, 571, 1713, 5139, 15417, 15607, 46251, 46821, 140463, 421389, 1264167, 8911597, 26734791, 80204373, 240613119, 721839357]

約数ペア:

[(1, 721839357), (3, 240613119), (9, 80204373), (27, 26734791), (81, 8911597), (571, 1264167), (1713, 421389), (5139, 140463), (15417, 46821), (15607, 46251)]