12782180

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{89}}^1\times {\mathrm{167}}^1$

素因数の和:308

約数の個数: 48

約数和(自身を含む): 27941760

約数和(自身を除く): 15159580

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 89, 167, 172, 178, 215, 334, 356, 430, 445, 668, 835, 860, 890, 1670, 1780, 3340, 3827, 7181, 7654, 14362, 14863, 15308, 19135, 28724, 29726, 35905, 38270, 59452, 71810, 74315, 76540, 143620, 148630, 297260, 639109, 1278218, 2556436, 3195545, 6391090, 12782180]

約数ペア:

[(1, 12782180), (2, 6391090), (4, 3195545), (5, 2556436), (10, 1278218), (20, 639109), (43, 297260), (86, 148630), (89, 143620), (167, 76540), (172, 74315), (178, 71810), (215, 59452), (334, 38270), (356, 35905), (430, 29726), (445, 28724), (668, 19135), (835, 15308), (860, 14863), (890, 14362), (1670, 7654), (1780, 7181), (3340, 3827)]