21223215

素因数分解:

$3^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{139}}^1$

素因数の和:198

約数の個数: 80

約数和(自身を含む): 42688800

約数和(自身を除く): 21465585

約数列:

[1, 3, 5, 9, 13, 15, 27, 29, 39, 45, 65, 81, 87, 117, 135, 139, 145, 195, 261, 351, 377, 405, 417, 435, 585, 695, 783, 1053, 1131, 1251, 1305, 1755, 1807, 1885, 2085, 2349, 3393, 3753, 3915, 4031, 5265, 5421, 5655, 6255, 9035, 10179, 11259, 11745, 12093, 16263, 16965, 18765, 20155, 27105, 30537, 36279, 48789, 50895, 52403, 56295, 60465, 81315, 108837, 146367, 152685, 157209, 181395, 243945, 262015, 326511, 471627, 544185, 731835, 786045, 1414881, 1632555, 2358135, 4244643, 7074405, 21223215]

約数ペア:

[(1, 21223215), (3, 7074405), (5, 4244643), (9, 2358135), (13, 1632555), (15, 1414881), (27, 786045), (29, 731835), (39, 544185), (45, 471627), (65, 326511), (81, 262015), (87, 243945), (117, 181395), (135, 157209), (139, 152685), (145, 146367), (195, 108837), (261, 81315), (351, 60465), (377, 56295), (405, 52403), (417, 50895), (435, 48789), (585, 36279), (695, 30537), (783, 27105), (1053, 20155), (1131, 18765), (1251, 16965), (1305, 16263), (1755, 12093), (1807, 11745), (1885, 11259), (2085, 10179), (2349, 9035), (3393, 6255), (3753, 5655), (3915, 5421), (4031, 5265)]