20543465

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{47}}^1\times {\mathrm{107}}^1$

素因数の和:221

約数の個数: 32

約数和(自身を含む): 27371520

約数和(自身を除く): 6828055

約数列:

[1, 5, 19, 43, 47, 95, 107, 215, 235, 535, 817, 893, 2021, 2033, 4085, 4465, 4601, 5029, 10105, 10165, 23005, 25145, 38399, 87419, 95551, 191995, 216247, 437095, 477755, 1081235, 4108693, 20543465]

約数ペア:

[(1, 20543465), (5, 4108693), (19, 1081235), (43, 477755), (47, 437095), (95, 216247), (107, 191995), (215, 95551), (235, 87419), (535, 38399), (817, 25145), (893, 23005), (2021, 10165), (2033, 10105), (4085, 5029), (4465, 4601)]