81285260

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{20021}}^1$

素因数の和:20066

約数の個数: 48

約数和(自身を含む): 201821760

約数和(自身を除く): 120536500

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 29, 35, 58, 70, 116, 140, 145, 203, 290, 406, 580, 812, 1015, 2030, 4060, 20021, 40042, 80084, 100105, 140147, 200210, 280294, 400420, 560588, 580609, 700735, 1161218, 1401470, 2322436, 2802940, 2903045, 4064263, 5806090, 8128526, 11612180, 16257052, 20321315, 40642630, 81285260]

約数ペア:

[(1, 81285260), (2, 40642630), (4, 20321315), (5, 16257052), (7, 11612180), (10, 8128526), (14, 5806090), (20, 4064263), (28, 2903045), (29, 2802940), (35, 2322436), (58, 1401470), (70, 1161218), (116, 700735), (140, 580609), (145, 560588), (203, 400420), (290, 280294), (406, 200210), (580, 140147), (812, 100105), (1015, 80084), (2030, 40042), (4060, 20021)]