21481089

素因数分解:

$3^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{61}}^1\times {\mathrm{409}}^1$

素因数の和:521

約数の個数: 32

約数和(自身を含む): 34164480

約数和(自身を除く): 12683391

約数列:

[1, 3, 7, 21, 41, 61, 123, 183, 287, 409, 427, 861, 1227, 1281, 2501, 2863, 7503, 8589, 16769, 17507, 24949, 50307, 52521, 74847, 117383, 174643, 352149, 523929, 1022909, 3068727, 7160363, 21481089]

約数ペア:

[(1, 21481089), (3, 7160363), (7, 3068727), (21, 1022909), (41, 523929), (61, 352149), (123, 174643), (183, 117383), (287, 74847), (409, 52521), (427, 50307), (861, 24949), (1227, 17507), (1281, 16769), (2501, 8589), (2863, 7503)]