21463840

素因数分解:

$2^5\times 5^1\times {\mathrm{163}}^1\times {\mathrm{823}}^1$

素因数の和:1001

約数の個数: 48

約数和(自身を含む): 51081408

約数和(自身を除く): 29617568

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 163, 326, 652, 815, 823, 1304, 1630, 1646, 2608, 3260, 3292, 4115, 5216, 6520, 6584, 8230, 13040, 13168, 16460, 26080, 26336, 32920, 65840, 131680, 134149, 268298, 536596, 670745, 1073192, 1341490, 2146384, 2682980, 4292768, 5365960, 10731920, 21463840]

約数ペア:

[(1, 21463840), (2, 10731920), (4, 5365960), (5, 4292768), (8, 2682980), (10, 2146384), (16, 1341490), (20, 1073192), (32, 670745), (40, 536596), (80, 268298), (160, 134149), (163, 131680), (326, 65840), (652, 32920), (815, 26336), (823, 26080), (1304, 16460), (1630, 13168), (1646, 13040), (2608, 8230), (3260, 6584), (3292, 6520), (4115, 5216)]