641960

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{1459}}^1$

素因数の和:1481

約数の個数: 32

約数和(自身を含む): 1576800

約数和(自身を除く): 934840

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 1459, 2918, 5836, 7295, 11672, 14590, 16049, 29180, 32098, 58360, 64196, 80245, 128392, 160490, 320980, 641960]

約数ペア:

[(1, 641960), (2, 320980), (4, 160490), (5, 128392), (8, 80245), (10, 64196), (11, 58360), (20, 32098), (22, 29180), (40, 16049), (44, 14590), (55, 11672), (88, 7295), (110, 5836), (220, 2918), (440, 1459)]