21197990

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^2\times {\mathrm{17519}}^1$

素因数の和:17548

約数の個数: 24

約数和(自身を含む): 41942880

約数和(自身を除く): 20744890

約数列:

[1, 2, 5, 10, 11, 22, 55, 110, 121, 242, 605, 1210, 17519, 35038, 87595, 175190, 192709, 385418, 963545, 1927090, 2119799, 4239598, 10598995, 21197990]

約数ペア:

[(1, 21197990), (2, 10598995), (5, 4239598), (10, 2119799), (11, 1927090), (22, 963545), (55, 385418), (110, 192709), (121, 175190), (242, 87595), (605, 35038), (1210, 17519)]