21912585

素因数分解:

$3^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{53}}^1\times {\mathrm{641}}^1$

素因数の和:745

約数の個数: 32

約数和(自身を含む): 36609408

約数和(自身を除く): 14696823

約数列:

[1, 3, 5, 15, 43, 53, 129, 159, 215, 265, 641, 645, 795, 1923, 2279, 3205, 6837, 9615, 11395, 27563, 33973, 34185, 82689, 101919, 137815, 169865, 413445, 509595, 1460839, 4382517, 7304195, 21912585]

約数ペア:

[(1, 21912585), (3, 7304195), (5, 4382517), (15, 1460839), (43, 509595), (53, 413445), (129, 169865), (159, 137815), (215, 101919), (265, 82689), (641, 34185), (645, 33973), (795, 27563), (1923, 11395), (2279, 9615), (3205, 6837)]