21576970

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^2\times {\mathrm{43}}^1\times {\mathrm{139}}^1$

素因数の和:227

約数の個数: 48

約数和(自身を含む): 42245280

約数和(自身を除く): 20668310

約数列:

[1, 2, 5, 10, 19, 38, 43, 86, 95, 139, 190, 215, 278, 361, 430, 695, 722, 817, 1390, 1634, 1805, 2641, 3610, 4085, 5282, 5977, 8170, 11954, 13205, 15523, 26410, 29885, 31046, 50179, 59770, 77615, 100358, 113563, 155230, 227126, 250895, 501790, 567815, 1135630, 2157697, 4315394, 10788485, 21576970]

約数ペア:

[(1, 21576970), (2, 10788485), (5, 4315394), (10, 2157697), (19, 1135630), (38, 567815), (43, 501790), (86, 250895), (95, 227126), (139, 155230), (190, 113563), (215, 100358), (278, 77615), (361, 59770), (430, 50179), (695, 31046), (722, 29885), (817, 26410), (1390, 15523), (1634, 13205), (1805, 11954), (2641, 8170), (3610, 5977), (4085, 5282)]