28676920

素因数分解:

$2^3\times 5^1\times {\mathrm{359}}^1\times {\mathrm{1997}}^1$

素因数の和:2367

約数の個数: 32

約数和(自身を含む): 64735200

約数和(自身を除く): 36058280

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 359, 718, 1436, 1795, 1997, 2872, 3590, 3994, 7180, 7988, 9985, 14360, 15976, 19970, 39940, 79880, 716923, 1433846, 2867692, 3584615, 5735384, 7169230, 14338460, 28676920]

約数ペア:

[(1, 28676920), (2, 14338460), (4, 7169230), (5, 5735384), (8, 3584615), (10, 2867692), (20, 1433846), (40, 716923), (359, 79880), (718, 39940), (1436, 19970), (1795, 15976), (1997, 14360), (2872, 9985), (3590, 7988), (3994, 7180)]