21971140

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{64621}}^1$

素因数の和:64647

約数の個数: 24

約数和(自身を含む): 48854232

約数和(自身を除く): 26883092

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340, 64621, 129242, 258484, 323105, 646210, 1098557, 1292420, 2197114, 4394228, 5492785, 10985570, 21971140]

約数ペア:

[(1, 21971140), (2, 10985570), (4, 5492785), (5, 4394228), (10, 2197114), (17, 1292420), (20, 1098557), (34, 646210), (68, 323105), (85, 258484), (170, 129242), (340, 64621)]