18944840

素因数分解:

$2^3\times 5^1\times {\mathrm{397}}^1\times {\mathrm{1193}}^1$

素因数の和:1601

約数の個数: 32

約数和(自身を含む): 42769080

約数和(自身を除く): 23824240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 397, 794, 1193, 1588, 1985, 2386, 3176, 3970, 4772, 5965, 7940, 9544, 11930, 15880, 23860, 47720, 473621, 947242, 1894484, 2368105, 3788968, 4736210, 9472420, 18944840]

約数ペア:

[(1, 18944840), (2, 9472420), (4, 4736210), (5, 3788968), (8, 2368105), (10, 1894484), (20, 947242), (40, 473621), (397, 47720), (794, 23860), (1193, 15880), (1588, 11930), (1985, 9544), (2386, 7940), (3176, 5965), (3970, 4772)]