21678668

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{61}}^1\times {\mathrm{197}}^1$

素因数の和:314

約数の個数: 48

約数和(自身を含む): 43309728

約数和(自身を除く): 21631060

約数列:

[1, 2, 4, 11, 22, 41, 44, 61, 82, 122, 164, 197, 244, 394, 451, 671, 788, 902, 1342, 1804, 2167, 2501, 2684, 4334, 5002, 8077, 8668, 10004, 12017, 16154, 24034, 27511, 32308, 48068, 55022, 88847, 110044, 132187, 177694, 264374, 355388, 492697, 528748, 985394, 1970788, 5419667, 10839334, 21678668]

約数ペア:

[(1, 21678668), (2, 10839334), (4, 5419667), (11, 1970788), (22, 985394), (41, 528748), (44, 492697), (61, 355388), (82, 264374), (122, 177694), (164, 132187), (197, 110044), (244, 88847), (394, 55022), (451, 48068), (671, 32308), (788, 27511), (902, 24034), (1342, 16154), (1804, 12017), (2167, 10004), (2501, 8668), (2684, 8077), (4334, 5002)]