20780478

素因数分解:

$2^1\times 3^2\times {\mathrm{31}}^1\times {\mathrm{167}}^1\times {\mathrm{223}}^1$

素因数の和:429

約数の個数: 48

約数和(自身を含む): 46964736

約数和(自身を除く): 26184258

約数列:

[1, 2, 3, 6, 9, 18, 31, 62, 93, 167, 186, 223, 279, 334, 446, 501, 558, 669, 1002, 1338, 1503, 2007, 3006, 4014, 5177, 6913, 10354, 13826, 15531, 20739, 31062, 37241, 41478, 46593, 62217, 74482, 93186, 111723, 124434, 223446, 335169, 670338, 1154471, 2308942, 3463413, 6926826, 10390239, 20780478]

約数ペア:

[(1, 20780478), (2, 10390239), (3, 6926826), (6, 3463413), (9, 2308942), (18, 1154471), (31, 670338), (62, 335169), (93, 223446), (167, 124434), (186, 111723), (223, 93186), (279, 74482), (334, 62217), (446, 46593), (501, 41478), (558, 37241), (669, 31062), (1002, 20739), (1338, 15531), (1503, 13826), (2007, 10354), (3006, 6913), (4014, 5177)]