20865880

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{74521}}^1$

素因数の和:74539

約数の個数: 32

約数和(自身を含む): 53655840

約数和(自身を除く): 32789960

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 74521, 149042, 298084, 372605, 521647, 596168, 745210, 1043294, 1490420, 2086588, 2608235, 2980840, 4173176, 5216470, 10432940, 20865880]

約数ペア:

[(1, 20865880), (2, 10432940), (4, 5216470), (5, 4173176), (7, 2980840), (8, 2608235), (10, 2086588), (14, 1490420), (20, 1043294), (28, 745210), (35, 596168), (40, 521647), (56, 372605), (70, 298084), (140, 149042), (280, 74521)]