21505197

素因数分解:

$3^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{24977}}^1$

素因数の和:25028

約数の個数: 16

約数和(自身を含む): 33570432

約数和(自身を除く): 12065235

約数列:

[1, 3, 7, 21, 41, 123, 287, 861, 24977, 74931, 174839, 524517, 1024057, 3072171, 7168399, 21505197]

約数ペア:

[(1, 21505197), (3, 7168399), (7, 3072171), (21, 1024057), (41, 524517), (123, 174839), (287, 74931), (861, 24977)]