16639940

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{109}}^1\times {\mathrm{449}}^1$

素因数の和:584

約数の個数: 48

約数和(自身を含む): 37422000

約数和(自身を除く): 20782060

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 109, 170, 218, 340, 436, 449, 545, 898, 1090, 1796, 1853, 2180, 2245, 3706, 4490, 7412, 7633, 8980, 9265, 15266, 18530, 30532, 37060, 38165, 48941, 76330, 97882, 152660, 195764, 244705, 489410, 831997, 978820, 1663994, 3327988, 4159985, 8319970, 16639940]

約数ペア:

[(1, 16639940), (2, 8319970), (4, 4159985), (5, 3327988), (10, 1663994), (17, 978820), (20, 831997), (34, 489410), (68, 244705), (85, 195764), (109, 152660), (170, 97882), (218, 76330), (340, 48941), (436, 38165), (449, 37060), (545, 30532), (898, 18530), (1090, 15266), (1796, 9265), (1853, 8980), (2180, 7633), (2245, 7412), (3706, 4490)]