21286377

素因数分解:

$3^2\times 7^1\times {\mathrm{29}}^1\times {\mathrm{61}}^1\times {\mathrm{191}}^1$

素因数の和:294

約数の個数: 48

約数和(自身を含む): 37140480

約数和(自身を除く): 15854103

約数列:

[1, 3, 7, 9, 21, 29, 61, 63, 87, 183, 191, 203, 261, 427, 549, 573, 609, 1281, 1337, 1719, 1769, 1827, 3843, 4011, 5307, 5539, 11651, 12033, 12383, 15921, 16617, 34953, 37149, 38773, 49851, 81557, 104859, 111447, 116319, 244671, 337879, 348957, 734013, 1013637, 2365153, 3040911, 7095459, 21286377]

約数ペア:

[(1, 21286377), (3, 7095459), (7, 3040911), (9, 2365153), (21, 1013637), (29, 734013), (61, 348957), (63, 337879), (87, 244671), (183, 116319), (191, 111447), (203, 104859), (261, 81557), (427, 49851), (549, 38773), (573, 37149), (609, 34953), (1281, 16617), (1337, 15921), (1719, 12383), (1769, 12033), (1827, 11651), (3843, 5539), (4011, 5307)]