20581155

素因数分解:

$3^3\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{751}}^1$

素因数の和:801

約数の個数: 64

約数和(自身を含む): 43315200

約数和(自身を除く): 22734045

約数列:

[1, 3, 5, 7, 9, 15, 21, 27, 29, 35, 45, 63, 87, 105, 135, 145, 189, 203, 261, 315, 435, 609, 751, 783, 945, 1015, 1305, 1827, 2253, 3045, 3755, 3915, 5257, 5481, 6759, 9135, 11265, 15771, 20277, 21779, 26285, 27405, 33795, 47313, 65337, 78855, 101385, 108895, 141939, 152453, 196011, 236565, 326685, 457359, 588033, 709695, 762265, 980055, 1372077, 2286795, 2940165, 4116231, 6860385, 20581155]

約数ペア:

[(1, 20581155), (3, 6860385), (5, 4116231), (7, 2940165), (9, 2286795), (15, 1372077), (21, 980055), (27, 762265), (29, 709695), (35, 588033), (45, 457359), (63, 326685), (87, 236565), (105, 196011), (135, 152453), (145, 141939), (189, 108895), (203, 101385), (261, 78855), (315, 65337), (435, 47313), (609, 33795), (751, 27405), (783, 26285), (945, 21779), (1015, 20277), (1305, 15771), (1827, 11265), (2253, 9135), (3045, 6759), (3755, 5481), (3915, 5257)]