21984170

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{263}}^1\times {\mathrm{643}}^1$

素因数の和:926

約数の個数: 32

約数和(自身を含む): 42844032

約数和(自身を除く): 20859862

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 263, 526, 643, 1286, 1315, 2630, 3215, 3419, 6430, 6838, 8359, 16718, 17095, 34190, 41795, 83590, 169109, 338218, 845545, 1691090, 2198417, 4396834, 10992085, 21984170]

約数ペア:

[(1, 21984170), (2, 10992085), (5, 4396834), (10, 2198417), (13, 1691090), (26, 845545), (65, 338218), (130, 169109), (263, 83590), (526, 41795), (643, 34190), (1286, 17095), (1315, 16718), (2630, 8359), (3215, 6838), (3419, 6430)]