21478797

素因数分解:

$3^3\times {\mathrm{19}}^1\times {\mathrm{149}}^1\times {\mathrm{281}}^1$

素因数の和:458

約数の個数: 32

約数和(自身を含む): 33840000

約数和(自身を除く): 12361203

約数列:

[1, 3, 9, 19, 27, 57, 149, 171, 281, 447, 513, 843, 1341, 2529, 2831, 4023, 5339, 7587, 8493, 16017, 25479, 41869, 48051, 76437, 125607, 144153, 376821, 795511, 1130463, 2386533, 7159599, 21478797]

約数ペア:

[(1, 21478797), (3, 7159599), (9, 2386533), (19, 1130463), (27, 795511), (57, 376821), (149, 144153), (171, 125607), (281, 76437), (447, 48051), (513, 41869), (843, 25479), (1341, 16017), (2529, 8493), (2831, 7587), (4023, 5339)]