21920217

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{53}}^1\times {\mathrm{83}}^1\times {\mathrm{151}}^1$

素因数の和:301

約数の個数: 32

約数和(自身を含む): 33094656

約数和(自身を除く): 11174439

約数列:

[1, 3, 11, 33, 53, 83, 151, 159, 249, 453, 583, 913, 1661, 1749, 2739, 4399, 4983, 8003, 12533, 13197, 24009, 37599, 48389, 88033, 137863, 145167, 264099, 413589, 664249, 1992747, 7306739, 21920217]

約数ペア:

[(1, 21920217), (3, 7306739), (11, 1992747), (33, 664249), (53, 413589), (83, 264099), (151, 145167), (159, 137863), (249, 88033), (453, 48389), (583, 37599), (913, 24009), (1661, 13197), (1749, 12533), (2739, 8003), (4399, 4983)]