21387512

素因数分解:

$2^3\times {\mathrm{43}}^1\times {\mathrm{79}}^1\times {\mathrm{787}}^1$

素因数の和:915

約数の個数: 32

約数和(自身を含む): 41606400

約数和(自身を除く): 20218888

約数列:

[1, 2, 4, 8, 43, 79, 86, 158, 172, 316, 344, 632, 787, 1574, 3148, 3397, 6296, 6794, 13588, 27176, 33841, 62173, 67682, 124346, 135364, 248692, 270728, 497384, 2673439, 5346878, 10693756, 21387512]

約数ペア:

[(1, 21387512), (2, 10693756), (4, 5346878), (8, 2673439), (43, 497384), (79, 270728), (86, 248692), (158, 135364), (172, 124346), (316, 67682), (344, 62173), (632, 33841), (787, 27176), (1574, 13588), (3148, 6794), (3397, 6296)]