19955560

素因数分解:

$2^3\times 5^1\times {\mathrm{53}}^1\times {\mathrm{9413}}^1$

素因数の和:9477

約数の個数: 32

約数和(自身を含む): 45752040

約数和(自身を除く): 25796480

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 53, 106, 212, 265, 424, 530, 1060, 2120, 9413, 18826, 37652, 47065, 75304, 94130, 188260, 376520, 498889, 997778, 1995556, 2494445, 3991112, 4988890, 9977780, 19955560]

約数ペア:

[(1, 19955560), (2, 9977780), (4, 4988890), (5, 3991112), (8, 2494445), (10, 1995556), (20, 997778), (40, 498889), (53, 376520), (106, 188260), (212, 94130), (265, 75304), (424, 47065), (530, 37652), (1060, 18826), (2120, 9413)]