18872260

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{109}}^1\times {\mathrm{787}}^1$

素因数の和:916

約数の個数: 48

約数和(自身を含む): 43686720

約数和(自身を除く): 24814460

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 109, 110, 218, 220, 436, 545, 787, 1090, 1199, 1574, 2180, 2398, 3148, 3935, 4796, 5995, 7870, 8657, 11990, 15740, 17314, 23980, 34628, 43285, 85783, 86570, 171566, 173140, 343132, 428915, 857830, 943613, 1715660, 1887226, 3774452, 4718065, 9436130, 18872260]

約数ペア:

[(1, 18872260), (2, 9436130), (4, 4718065), (5, 3774452), (10, 1887226), (11, 1715660), (20, 943613), (22, 857830), (44, 428915), (55, 343132), (109, 173140), (110, 171566), (218, 86570), (220, 85783), (436, 43285), (545, 34628), (787, 23980), (1090, 17314), (1199, 15740), (1574, 11990), (2180, 8657), (2398, 7870), (3148, 5995), (3935, 4796)]