18815120

素因数分解:

$2^4\times 5^1\times {\mathrm{479}}^1\times {\mathrm{491}}^1$

素因数の和:983

約数の個数: 40

約数和(自身を含む): 43925760

約数和(自身を除く): 25110640

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 479, 491, 958, 982, 1916, 1964, 2395, 2455, 3832, 3928, 4790, 4910, 7664, 7856, 9580, 9820, 19160, 19640, 38320, 39280, 235189, 470378, 940756, 1175945, 1881512, 2351890, 3763024, 4703780, 9407560, 18815120]

約数ペア:

[(1, 18815120), (2, 9407560), (4, 4703780), (5, 3763024), (8, 2351890), (10, 1881512), (16, 1175945), (20, 940756), (40, 470378), (80, 235189), (479, 39280), (491, 38320), (958, 19640), (982, 19160), (1916, 9820), (1964, 9580), (2395, 7856), (2455, 7664), (3832, 4910), (3928, 4790)]