20005420

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{11239}}^1$

素因数の和:11337

約数の個数: 24

約数和(自身を含む): 42487200

約数和(自身を除く): 22481780

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 356, 445, 890, 1780, 11239, 22478, 44956, 56195, 112390, 224780, 1000271, 2000542, 4001084, 5001355, 10002710, 20005420]

約数ペア:

[(1, 20005420), (2, 10002710), (4, 5001355), (5, 4001084), (10, 2000542), (20, 1000271), (89, 224780), (178, 112390), (356, 56195), (445, 44956), (890, 22478), (1780, 11239)]