21085420

素因数分解:

$2^2\times 5^1\times {\mathrm{59}}^1\times {\mathrm{107}}^1\times {\mathrm{167}}^1$

素因数の和:342

約数の個数: 48

約数和(自身を含む): 45722880

約数和(自身を除く): 24637460

約数列:

[1, 2, 4, 5, 10, 20, 59, 107, 118, 167, 214, 236, 295, 334, 428, 535, 590, 668, 835, 1070, 1180, 1670, 2140, 3340, 6313, 9853, 12626, 17869, 19706, 25252, 31565, 35738, 39412, 49265, 63130, 71476, 89345, 98530, 126260, 178690, 197060, 357380, 1054271, 2108542, 4217084, 5271355, 10542710, 21085420]

約数ペア:

[(1, 21085420), (2, 10542710), (4, 5271355), (5, 4217084), (10, 2108542), (20, 1054271), (59, 357380), (107, 197060), (118, 178690), (167, 126260), (214, 98530), (236, 89345), (295, 71476), (334, 63130), (428, 49265), (535, 39412), (590, 35738), (668, 31565), (835, 25252), (1070, 19706), (1180, 17869), (1670, 12626), (2140, 9853), (3340, 6313)]