21805028

素因数分解:

$2^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{25121}}^1$

素因数の和:25163

約数の個数: 24

約数和(自身を含む): 45018624

約数和(自身を除く): 23213596

約数列:

[1, 2, 4, 7, 14, 28, 31, 62, 124, 217, 434, 868, 25121, 50242, 100484, 175847, 351694, 703388, 778751, 1557502, 3115004, 5451257, 10902514, 21805028]

約数ペア:

[(1, 21805028), (2, 10902514), (4, 5451257), (7, 3115004), (14, 1557502), (28, 778751), (31, 703388), (62, 351694), (124, 175847), (217, 100484), (434, 50242), (868, 25121)]