289942420

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{162889}}^1$

素因数の和:162987

約数の個数: 24

約数和(自身を含む): 615724200

約数和(自身を除く): 325781780

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 356, 445, 890, 1780, 162889, 325778, 651556, 814445, 1628890, 3257780, 14497121, 28994242, 57988484, 72485605, 144971210, 289942420]

約数ペア:

[(1, 289942420), (2, 144971210), (4, 72485605), (5, 57988484), (10, 28994242), (20, 14497121), (89, 3257780), (178, 1628890), (356, 814445), (445, 651556), (890, 325778), (1780, 162889)]