79391240

素因数分解:

$2^3\times 5^1\times {\mathrm{109}}^1\times {\mathrm{131}}^1\times {\mathrm{139}}^1$

素因数の和:390

約数の個数: 64

約数和(自身を含む): 182952000

約数和(自身を除く): 103560760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 109, 131, 139, 218, 262, 278, 436, 524, 545, 556, 655, 695, 872, 1048, 1090, 1112, 1310, 1390, 2180, 2620, 2780, 4360, 5240, 5560, 14279, 15151, 18209, 28558, 30302, 36418, 57116, 60604, 71395, 72836, 75755, 91045, 114232, 121208, 142790, 145672, 151510, 182090, 285580, 303020, 364180, 571160, 606040, 728360, 1984781, 3969562, 7939124, 9923905, 15878248, 19847810, 39695620, 79391240]

約数ペア:

[(1, 79391240), (2, 39695620), (4, 19847810), (5, 15878248), (8, 9923905), (10, 7939124), (20, 3969562), (40, 1984781), (109, 728360), (131, 606040), (139, 571160), (218, 364180), (262, 303020), (278, 285580), (436, 182090), (524, 151510), (545, 145672), (556, 142790), (655, 121208), (695, 114232), (872, 91045), (1048, 75755), (1090, 72836), (1112, 71395), (1310, 60604), (1390, 57116), (2180, 36418), (2620, 30302), (2780, 28558), (4360, 18209), (5240, 15151), (5560, 14279)]