21122740

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{977}}^1$

素因数の和:1056

約数の個数: 48

約数和(自身を含む): 47319552

約数和(自身を除く): 26196812

約数列:

[1, 2, 4, 5, 10, 20, 23, 46, 47, 92, 94, 115, 188, 230, 235, 460, 470, 940, 977, 1081, 1954, 2162, 3908, 4324, 4885, 5405, 9770, 10810, 19540, 21620, 22471, 44942, 45919, 89884, 91838, 112355, 183676, 224710, 229595, 449420, 459190, 918380, 1056137, 2112274, 4224548, 5280685, 10561370, 21122740]

約数ペア:

[(1, 21122740), (2, 10561370), (4, 5280685), (5, 4224548), (10, 2112274), (20, 1056137), (23, 918380), (46, 459190), (47, 449420), (92, 229595), (94, 224710), (115, 183676), (188, 112355), (230, 91838), (235, 89884), (460, 45919), (470, 44942), (940, 22471), (977, 21620), (1081, 19540), (1954, 10810), (2162, 9770), (3908, 5405), (4324, 4885)]