21815325

素因数分解:

$3^8\times 5^2\times 7^1\times {\mathrm{19}}^1$

素因数の和:60

約数の個数: 108

約数和(自身を含む): 48811360

約数和(自身を除く): 26996035

約数列:

[1, 3, 5, 7, 9, 15, 19, 21, 25, 27, 35, 45, 57, 63, 75, 81, 95, 105, 133, 135, 171, 175, 189, 225, 243, 285, 315, 399, 405, 475, 513, 525, 567, 665, 675, 729, 855, 945, 1197, 1215, 1425, 1539, 1575, 1701, 1995, 2025, 2187, 2565, 2835, 3325, 3591, 3645, 4275, 4617, 4725, 5103, 5985, 6075, 6561, 7695, 8505, 9975, 10773, 10935, 12825, 13851, 14175, 15309, 17955, 18225, 23085, 25515, 29925, 32319, 32805, 38475, 41553, 42525, 45927, 53865, 54675, 69255, 76545, 89775, 96957, 115425, 124659, 127575, 161595, 164025, 207765, 229635, 269325, 290871, 346275, 382725, 484785, 623295, 807975, 872613, 1038825, 1148175, 1454355, 2423925, 3116475, 4363065, 7271775, 21815325]

約数ペア:

[(1, 21815325), (3, 7271775), (5, 4363065), (7, 3116475), (9, 2423925), (15, 1454355), (19, 1148175), (21, 1038825), (25, 872613), (27, 807975), (35, 623295), (45, 484785), (57, 382725), (63, 346275), (75, 290871), (81, 269325), (95, 229635), (105, 207765), (133, 164025), (135, 161595), (171, 127575), (175, 124659), (189, 115425), (225, 96957), (243, 89775), (285, 76545), (315, 69255), (399, 54675), (405, 53865), (475, 45927), (513, 42525), (525, 41553), (567, 38475), (665, 32805), (675, 32319), (729, 29925), (855, 25515), (945, 23085), (1197, 18225), (1215, 17955), (1425, 15309), (1539, 14175), (1575, 13851), (1701, 12825), (1995, 10935), (2025, 10773), (2187, 9975), (2565, 8505), (2835, 7695), (3325, 6561), (3591, 6075), (3645, 5985), (4275, 5103), (4617, 4725)]