20901405

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{137}}^1\times {\mathrm{1453}}^1$

素因数の和:1605

約数の個数: 32

約数和(自身を含む): 38525184

約数和(自身を除く): 17623779

約数列:

[1, 3, 5, 7, 15, 21, 35, 105, 137, 411, 685, 959, 1453, 2055, 2877, 4359, 4795, 7265, 10171, 14385, 21795, 30513, 50855, 152565, 199061, 597183, 995305, 1393427, 2985915, 4180281, 6967135, 20901405]

約数ペア:

[(1, 20901405), (3, 6967135), (5, 4180281), (7, 2985915), (15, 1393427), (21, 995305), (35, 597183), (105, 199061), (137, 152565), (411, 50855), (685, 30513), (959, 21795), (1453, 14385), (2055, 10171), (2877, 7265), (4359, 4795)]