21761980

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{26539}}^1$

素因数の和:26589

約数の個数: 24

約数和(自身を含む): 46816560

約数和(自身を除く): 25054580

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 26539, 53078, 106156, 132695, 265390, 530780, 1088099, 2176198, 4352396, 5440495, 10880990, 21761980]

約数ペア:

[(1, 21761980), (2, 10880990), (4, 5440495), (5, 4352396), (10, 2176198), (20, 1088099), (41, 530780), (82, 265390), (164, 132695), (205, 106156), (410, 53078), (820, 26539)]