20138720

素因数分解:

$2^5\times 5^1\times 7^1\times {\mathrm{17981}}^1$

素因数の和:18003

約数の個数: 48

約数和(自身を含む): 54377568

約数和(自身を除く): 34238848

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 56, 70, 80, 112, 140, 160, 224, 280, 560, 1120, 17981, 35962, 71924, 89905, 125867, 143848, 179810, 251734, 287696, 359620, 503468, 575392, 629335, 719240, 1006936, 1258670, 1438480, 2013872, 2517340, 2876960, 4027744, 5034680, 10069360, 20138720]

約数ペア:

[(1, 20138720), (2, 10069360), (4, 5034680), (5, 4027744), (7, 2876960), (8, 2517340), (10, 2013872), (14, 1438480), (16, 1258670), (20, 1006936), (28, 719240), (32, 629335), (35, 575392), (40, 503468), (56, 359620), (70, 287696), (80, 251734), (112, 179810), (140, 143848), (160, 125867), (224, 89905), (280, 71924), (560, 35962), (1120, 17981)]