21778260

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{51853}}^1$

素因数の和:51872

約数の個数: 48

約数和(自身を含む): 69691776

約数和(自身を除く): 47913516

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 51853, 103706, 155559, 207412, 259265, 311118, 362971, 518530, 622236, 725942, 777795, 1037060, 1088913, 1451884, 1555590, 1814855, 2177826, 3111180, 3629710, 4355652, 5444565, 7259420, 10889130, 21778260]

約数ペア:

[(1, 21778260), (2, 10889130), (3, 7259420), (4, 5444565), (5, 4355652), (6, 3629710), (7, 3111180), (10, 2177826), (12, 1814855), (14, 1555590), (15, 1451884), (20, 1088913), (21, 1037060), (28, 777795), (30, 725942), (35, 622236), (42, 518530), (60, 362971), (70, 311118), (84, 259265), (105, 207412), (140, 155559), (210, 103706), (420, 51853)]