21881805

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{269}}^1$

素因数の和:334

約数の個数: 64

約数和(自身を含む): 41990400

約数和(自身を除く): 20108595

約数列:

[1, 3, 5, 11, 15, 17, 29, 33, 51, 55, 85, 87, 145, 165, 187, 255, 269, 319, 435, 493, 561, 807, 935, 957, 1345, 1479, 1595, 2465, 2805, 2959, 4035, 4573, 4785, 5423, 7395, 7801, 8877, 13719, 14795, 16269, 22865, 23403, 27115, 39005, 44385, 50303, 68595, 81345, 85811, 117015, 132617, 150909, 251515, 257433, 397851, 429055, 663085, 754545, 1287165, 1458787, 1989255, 4376361, 7293935, 21881805]

約数ペア:

[(1, 21881805), (3, 7293935), (5, 4376361), (11, 1989255), (15, 1458787), (17, 1287165), (29, 754545), (33, 663085), (51, 429055), (55, 397851), (85, 257433), (87, 251515), (145, 150909), (165, 132617), (187, 117015), (255, 85811), (269, 81345), (319, 68595), (435, 50303), (493, 44385), (561, 39005), (807, 27115), (935, 23403), (957, 22865), (1345, 16269), (1479, 14795), (1595, 13719), (2465, 8877), (2805, 7801), (2959, 7395), (4035, 5423), (4573, 4785)]