80919980

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{4091}}^1$

素因数の和:4166

約数の個数: 48

約数和(自身を含む): 181488384

約数和(自身を除く): 100568404

約数列:

[1, 2, 4, 5, 10, 20, 23, 43, 46, 86, 92, 115, 172, 215, 230, 430, 460, 860, 989, 1978, 3956, 4091, 4945, 8182, 9890, 16364, 19780, 20455, 40910, 81820, 94093, 175913, 188186, 351826, 376372, 470465, 703652, 879565, 940930, 1759130, 1881860, 3518260, 4045999, 8091998, 16183996, 20229995, 40459990, 80919980]

約数ペア:

[(1, 80919980), (2, 40459990), (4, 20229995), (5, 16183996), (10, 8091998), (20, 4045999), (23, 3518260), (43, 1881860), (46, 1759130), (86, 940930), (92, 879565), (115, 703652), (172, 470465), (215, 376372), (230, 351826), (430, 188186), (460, 175913), (860, 94093), (989, 81820), (1978, 40910), (3956, 20455), (4091, 19780), (4945, 16364), (8182, 9890)]