21246057

素因数分解:

$3^4\times 7^2\times {\mathrm{53}}^1\times {\mathrm{101}}^1$

素因数の和:180

約数の個数: 60

約数和(自身を含む): 37988676

約数和(自身を除く): 16742619

約数列:

[1, 3, 7, 9, 21, 27, 49, 53, 63, 81, 101, 147, 159, 189, 303, 371, 441, 477, 567, 707, 909, 1113, 1323, 1431, 2121, 2597, 2727, 3339, 3969, 4293, 4949, 5353, 6363, 7791, 8181, 10017, 14847, 16059, 19089, 23373, 30051, 37471, 44541, 48177, 57267, 70119, 112413, 133623, 144531, 210357, 262297, 337239, 400869, 433593, 786891, 1011717, 2360673, 3035151, 7082019, 21246057]

約数ペア:

[(1, 21246057), (3, 7082019), (7, 3035151), (9, 2360673), (21, 1011717), (27, 786891), (49, 433593), (53, 400869), (63, 337239), (81, 262297), (101, 210357), (147, 144531), (159, 133623), (189, 112413), (303, 70119), (371, 57267), (441, 48177), (477, 44541), (567, 37471), (707, 30051), (909, 23373), (1113, 19089), (1323, 16059), (1431, 14847), (2121, 10017), (2597, 8181), (2727, 7791), (3339, 6363), (3969, 5353), (4293, 4949)]