199143320

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{115781}}^1$

素因数の和:115835

約数の個数: 32

約数和(自身を含む): 458496720

約数和(自身を除く): 259353400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 115781, 231562, 463124, 578905, 926248, 1157810, 2315620, 4631240, 4978583, 9957166, 19914332, 24892915, 39828664, 49785830, 99571660, 199143320]

約数ペア:

[(1, 199143320), (2, 99571660), (4, 49785830), (5, 39828664), (8, 24892915), (10, 19914332), (20, 9957166), (40, 4978583), (43, 4631240), (86, 2315620), (172, 1157810), (215, 926248), (344, 578905), (430, 463124), (860, 231562), (1720, 115781)]