21467920

素因数分解:

$2^4\times 5^1\times {\mathrm{149}}^1\times {\mathrm{1801}}^1$

素因数の和:1963

約数の個数: 40

約数和(自身を含む): 50275800

約数和(自身を除く): 28807880

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 149, 298, 596, 745, 1192, 1490, 1801, 2384, 2980, 3602, 5960, 7204, 9005, 11920, 14408, 18010, 28816, 36020, 72040, 144080, 268349, 536698, 1073396, 1341745, 2146792, 2683490, 4293584, 5366980, 10733960, 21467920]

約数ペア:

[(1, 21467920), (2, 10733960), (4, 5366980), (5, 4293584), (8, 2683490), (10, 2146792), (16, 1341745), (20, 1073396), (40, 536698), (80, 268349), (149, 144080), (298, 72040), (596, 36020), (745, 28816), (1192, 18010), (1490, 14408), (1801, 11920), (2384, 9005), (2980, 7204), (3602, 5960)]