21860840

素因数分解:

$2^3\times 5^1\times {\mathrm{277}}^1\times {\mathrm{1973}}^1$

素因数の和:2261

約数の個数: 32

約数和(自身を含む): 49389480

約数和(自身を除く): 27528640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 277, 554, 1108, 1385, 1973, 2216, 2770, 3946, 5540, 7892, 9865, 11080, 15784, 19730, 39460, 78920, 546521, 1093042, 2186084, 2732605, 4372168, 5465210, 10930420, 21860840]

約数ペア:

[(1, 21860840), (2, 10930420), (4, 5465210), (5, 4372168), (8, 2732605), (10, 2186084), (20, 1093042), (40, 546521), (277, 78920), (554, 39460), (1108, 19730), (1385, 15784), (1973, 11080), (2216, 9865), (2770, 7892), (3946, 5540)]