21393735

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{263}}^1$

素因数の和:328

約数の個数: 64

約数和(自身を含む): 41057280

約数和(自身を除く): 19663545

約数列:

[1, 3, 5, 11, 15, 17, 29, 33, 51, 55, 85, 87, 145, 165, 187, 255, 263, 319, 435, 493, 561, 789, 935, 957, 1315, 1479, 1595, 2465, 2805, 2893, 3945, 4471, 4785, 5423, 7395, 7627, 8679, 13413, 14465, 16269, 22355, 22881, 27115, 38135, 43395, 49181, 67065, 81345, 83897, 114405, 129659, 147543, 245905, 251691, 388977, 419485, 648295, 737715, 1258455, 1426249, 1944885, 4278747, 7131245, 21393735]

約数ペア:

[(1, 21393735), (3, 7131245), (5, 4278747), (11, 1944885), (15, 1426249), (17, 1258455), (29, 737715), (33, 648295), (51, 419485), (55, 388977), (85, 251691), (87, 245905), (145, 147543), (165, 129659), (187, 114405), (255, 83897), (263, 81345), (319, 67065), (435, 49181), (493, 43395), (561, 38135), (789, 27115), (935, 22881), (957, 22355), (1315, 16269), (1479, 14465), (1595, 13413), (2465, 8679), (2805, 7627), (2893, 7395), (3945, 5423), (4471, 4785)]