2178987890

素因数分解:

$2^1\times 5^1\times {\mathrm{89}}^2\times {\mathrm{27509}}^1$

素因数の和:27694

約数の個数: 24

約数和(自身を含む): 3966886980

約数和(自身を除く): 1787899090

約数列:

[1, 2, 5, 10, 89, 178, 445, 890, 7921, 15842, 27509, 39605, 55018, 79210, 137545, 275090, 2448301, 4896602, 12241505, 24483010, 217898789, 435797578, 1089493945, 2178987890]

約数ペア:

[(1, 2178987890), (2, 1089493945), (5, 435797578), (10, 217898789), (89, 24483010), (178, 12241505), (445, 4896602), (890, 2448301), (7921, 275090), (15842, 137545), (27509, 79210), (39605, 55018)]