21208724

素因数分解:

$2^2\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{5113}}^1$

素因数の和:5195

約数の個数: 24

約数和(自身を含む): 39950568

約数和(自身を除く): 18741844

約数列:

[1, 2, 4, 17, 34, 61, 68, 122, 244, 1037, 2074, 4148, 5113, 10226, 20452, 86921, 173842, 311893, 347684, 623786, 1247572, 5302181, 10604362, 21208724]

約数ペア:

[(1, 21208724), (2, 10604362), (4, 5302181), (17, 1247572), (34, 623786), (61, 347684), (68, 311893), (122, 173842), (244, 86921), (1037, 20452), (2074, 10226), (4148, 5113)]