21360860

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{131}}^1\times {\mathrm{263}}^1$

素因数の和:434

約数の個数: 48

約数和(自身を含む): 46835712

約数和(自身を除く): 25474852

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 131, 155, 262, 263, 310, 524, 526, 620, 655, 1052, 1310, 1315, 2620, 2630, 4061, 5260, 8122, 8153, 16244, 16306, 20305, 32612, 34453, 40610, 40765, 68906, 81220, 81530, 137812, 163060, 172265, 344530, 689060, 1068043, 2136086, 4272172, 5340215, 10680430, 21360860]

約数ペア:

[(1, 21360860), (2, 10680430), (4, 5340215), (5, 4272172), (10, 2136086), (20, 1068043), (31, 689060), (62, 344530), (124, 172265), (131, 163060), (155, 137812), (262, 81530), (263, 81220), (310, 68906), (524, 40765), (526, 40610), (620, 34453), (655, 32612), (1052, 20305), (1310, 16306), (1315, 16244), (2620, 8153), (2630, 8122), (4061, 5260)]