21361060

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{71}}^1\times {\mathrm{307}}^1$

素因数の和:401

約数の個数: 72

約数和(自身を含む): 53089344

約数和(自身を除く): 31728284

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 71, 98, 140, 142, 196, 245, 284, 307, 355, 490, 497, 614, 710, 980, 994, 1228, 1420, 1535, 1988, 2149, 2485, 3070, 3479, 4298, 4970, 6140, 6958, 8596, 9940, 10745, 13916, 15043, 17395, 21490, 21797, 30086, 34790, 42980, 43594, 60172, 69580, 75215, 87188, 108985, 150430, 152579, 217970, 300860, 305158, 435940, 610316, 762895, 1068053, 1525790, 2136106, 3051580, 4272212, 5340265, 10680530, 21361060]

約数ペア:

[(1, 21361060), (2, 10680530), (4, 5340265), (5, 4272212), (7, 3051580), (10, 2136106), (14, 1525790), (20, 1068053), (28, 762895), (35, 610316), (49, 435940), (70, 305158), (71, 300860), (98, 217970), (140, 152579), (142, 150430), (196, 108985), (245, 87188), (284, 75215), (307, 69580), (355, 60172), (490, 43594), (497, 42980), (614, 34790), (710, 30086), (980, 21797), (994, 21490), (1228, 17395), (1420, 15043), (1535, 13916), (1988, 10745), (2149, 9940), (2485, 8596), (3070, 6958), (3479, 6140), (4298, 4970)]