21705885

素因数分解:

$3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{479}}^1$

素因数の和:562

約数の個数: 48

約数和(自身を含む): 40435200

約数和(自身を除く): 18729315

約数列:

[1, 3, 5, 9, 15, 19, 45, 53, 57, 95, 159, 171, 265, 285, 477, 479, 795, 855, 1007, 1437, 2385, 2395, 3021, 4311, 5035, 7185, 9063, 9101, 15105, 21555, 25387, 27303, 45315, 45505, 76161, 81909, 126935, 136515, 228483, 380805, 409545, 482353, 1142415, 1447059, 2411765, 4341177, 7235295, 21705885]

約数ペア:

[(1, 21705885), (3, 7235295), (5, 4341177), (9, 2411765), (15, 1447059), (19, 1142415), (45, 482353), (53, 409545), (57, 380805), (95, 228483), (159, 136515), (171, 126935), (265, 81909), (285, 76161), (477, 45505), (479, 45315), (795, 27303), (855, 25387), (1007, 21555), (1437, 15105), (2385, 9101), (2395, 9063), (3021, 7185), (4311, 5035)]