21110355

素因数分解:

$3^3\times 5^1\times 7^1\times {\mathrm{89}}^1\times {\mathrm{251}}^1$

素因数の和:361

約数の個数: 64

約数和(自身を含む): 43545600

約数和(自身を除く): 22435245

約数列:

[1, 3, 5, 7, 9, 15, 21, 27, 35, 45, 63, 89, 105, 135, 189, 251, 267, 315, 445, 623, 753, 801, 945, 1255, 1335, 1757, 1869, 2259, 2403, 3115, 3765, 4005, 5271, 5607, 6777, 8785, 9345, 11295, 12015, 15813, 16821, 22339, 26355, 28035, 33885, 47439, 67017, 79065, 84105, 111695, 156373, 201051, 237195, 335085, 469119, 603153, 781865, 1005255, 1407357, 2345595, 3015765, 4222071, 7036785, 21110355]

約数ペア:

[(1, 21110355), (3, 7036785), (5, 4222071), (7, 3015765), (9, 2345595), (15, 1407357), (21, 1005255), (27, 781865), (35, 603153), (45, 469119), (63, 335085), (89, 237195), (105, 201051), (135, 156373), (189, 111695), (251, 84105), (267, 79065), (315, 67017), (445, 47439), (623, 33885), (753, 28035), (801, 26355), (945, 22339), (1255, 16821), (1335, 15813), (1757, 12015), (1869, 11295), (2259, 9345), (2403, 8785), (3115, 6777), (3765, 5607), (4005, 5271)]