81205880

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{290021}}^1$

素因数の和:290039

約数の個数: 32

約数和(自身を含む): 208815840

約数和(自身を除く): 127609960

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 290021, 580042, 1160084, 1450105, 2030147, 2320168, 2900210, 4060294, 5800420, 8120588, 10150735, 11600840, 16241176, 20301470, 40602940, 81205880]

約数ペア:

[(1, 81205880), (2, 40602940), (4, 20301470), (5, 16241176), (7, 11600840), (8, 10150735), (10, 8120588), (14, 5800420), (20, 4060294), (28, 2900210), (35, 2320168), (40, 2030147), (56, 1450105), (70, 1160084), (140, 580042), (280, 290021)]