20557395

素因数分解:

$3^4\times 5^1\times {\mathrm{193}}^1\times {\mathrm{263}}^1$

素因数の和:473

約数の個数: 40

約数和(自身を含む): 37182816

約数和(自身を除く): 16625421

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 193, 263, 405, 579, 789, 965, 1315, 1737, 2367, 2895, 3945, 5211, 7101, 8685, 11835, 15633, 21303, 26055, 35505, 50759, 78165, 106515, 152277, 253795, 456831, 761385, 1370493, 2284155, 4111479, 6852465, 20557395]

約数ペア:

[(1, 20557395), (3, 6852465), (5, 4111479), (9, 2284155), (15, 1370493), (27, 761385), (45, 456831), (81, 253795), (135, 152277), (193, 106515), (263, 78165), (405, 50759), (579, 35505), (789, 26055), (965, 21303), (1315, 15633), (1737, 11835), (2367, 8685), (2895, 7101), (3945, 5211)]