21492765

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{31}}^2\times {\mathrm{71}}^1$

素因数の和:151

約数の個数: 72

約数和(自身を含む): 44613504

約数和(自身を除く): 23120739

約数列:

[1, 3, 5, 7, 9, 15, 21, 31, 35, 45, 63, 71, 93, 105, 155, 213, 217, 279, 315, 355, 465, 497, 639, 651, 961, 1065, 1085, 1395, 1491, 1953, 2201, 2485, 2883, 3195, 3255, 4473, 4805, 6603, 6727, 7455, 8649, 9765, 11005, 14415, 15407, 19809, 20181, 22365, 33015, 33635, 43245, 46221, 60543, 68231, 77035, 99045, 100905, 138663, 204693, 231105, 302715, 341155, 477617, 614079, 693315, 1023465, 1432851, 2388085, 3070395, 4298553, 7164255, 21492765]

約数ペア:

[(1, 21492765), (3, 7164255), (5, 4298553), (7, 3070395), (9, 2388085), (15, 1432851), (21, 1023465), (31, 693315), (35, 614079), (45, 477617), (63, 341155), (71, 302715), (93, 231105), (105, 204693), (155, 138663), (213, 100905), (217, 99045), (279, 77035), (315, 68231), (355, 60543), (465, 46221), (497, 43245), (639, 33635), (651, 33015), (961, 22365), (1065, 20181), (1085, 19809), (1395, 15407), (1491, 14415), (1953, 11005), (2201, 9765), (2485, 8649), (2883, 7455), (3195, 6727), (3255, 6603), (4473, 4805)]