20961918

素因数分解:

$2^1\times 3^2\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{1123}}^1$

素因数の和:1209

約数の個数: 48

約数和(自身を含む): 48920976

約数和(自身を除く): 27959058

約数列:

[1, 2, 3, 6, 9, 17, 18, 34, 51, 61, 102, 122, 153, 183, 306, 366, 549, 1037, 1098, 1123, 2074, 2246, 3111, 3369, 6222, 6738, 9333, 10107, 18666, 19091, 20214, 38182, 57273, 68503, 114546, 137006, 171819, 205509, 343638, 411018, 616527, 1164551, 1233054, 2329102, 3493653, 6987306, 10480959, 20961918]

約数ペア:

[(1, 20961918), (2, 10480959), (3, 6987306), (6, 3493653), (9, 2329102), (17, 1233054), (18, 1164551), (34, 616527), (51, 411018), (61, 343638), (102, 205509), (122, 171819), (153, 137006), (183, 114546), (306, 68503), (366, 57273), (549, 38182), (1037, 20214), (1098, 19091), (1123, 18666), (2074, 10107), (2246, 9333), (3111, 6738), (3369, 6222)]