21781437

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{599}}^1$

素因数の和:673

約数の個数: 32

約数和(自身を含む): 33177600

約数和(自身を除く): 11396163

約数列:

[1, 3, 17, 23, 31, 51, 69, 93, 391, 527, 599, 713, 1173, 1581, 1797, 2139, 10183, 12121, 13777, 18569, 30549, 36363, 41331, 55707, 234209, 315673, 427087, 702627, 947019, 1281261, 7260479, 21781437]

約数ペア:

[(1, 21781437), (3, 7260479), (17, 1281261), (23, 947019), (31, 702627), (51, 427087), (69, 315673), (93, 234209), (391, 55707), (527, 41331), (599, 36363), (713, 30549), (1173, 18569), (1581, 13777), (1797, 12121), (2139, 10183)]