21486380

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{12071}}^1$

素因数の和:12169

約数の個数: 24

約数和(自身を含む): 45632160

約数和(自身を除く): 24145780

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 356, 445, 890, 1780, 12071, 24142, 48284, 60355, 120710, 241420, 1074319, 2148638, 4297276, 5371595, 10743190, 21486380]

約数ペア:

[(1, 21486380), (2, 10743190), (4, 5371595), (5, 4297276), (10, 2148638), (20, 1074319), (89, 241420), (178, 120710), (356, 60355), (445, 48284), (890, 24142), (1780, 12071)]