21994640

素因数分解:

$2^4\times 5^1\times {\mathrm{211}}^1\times {\mathrm{1303}}^1$

素因数の和:1527

約数の個数: 40

約数和(自身を含む): 51419328

約数和(自身を除く): 29424688

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 211, 422, 844, 1055, 1303, 1688, 2110, 2606, 3376, 4220, 5212, 6515, 8440, 10424, 13030, 16880, 20848, 26060, 52120, 104240, 274933, 549866, 1099732, 1374665, 2199464, 2749330, 4398928, 5498660, 10997320, 21994640]

約数ペア:

[(1, 21994640), (2, 10997320), (4, 5498660), (5, 4398928), (8, 2749330), (10, 2199464), (16, 1374665), (20, 1099732), (40, 549866), (80, 274933), (211, 104240), (422, 52120), (844, 26060), (1055, 20848), (1303, 16880), (1688, 13030), (2110, 10424), (2606, 8440), (3376, 6515), (4220, 5212)]