21907665

素因数分解:

$3^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{73}}^1$

素因数の和:125

約数の個数: 96

約数和(自身を含む): 45252480

約数和(自身を除く): 23344815

約数列:

[1, 3, 5, 9, 13, 15, 19, 27, 39, 45, 57, 65, 73, 81, 95, 117, 135, 171, 195, 219, 243, 247, 285, 351, 365, 405, 513, 585, 657, 741, 855, 949, 1053, 1095, 1215, 1235, 1387, 1539, 1755, 1971, 2223, 2565, 2847, 3159, 3285, 3705, 4161, 4617, 4745, 5265, 5913, 6669, 6935, 7695, 8541, 9855, 11115, 12483, 14235, 15795, 17739, 18031, 20007, 20805, 23085, 25623, 29565, 33345, 37449, 42705, 54093, 60021, 62415, 76869, 88695, 90155, 100035, 112347, 128115, 162279, 187245, 230607, 270465, 300105, 337041, 384345, 486837, 561735, 811395, 1153035, 1460511, 1685205, 2434185, 4381533, 7302555, 21907665]

約数ペア:

[(1, 21907665), (3, 7302555), (5, 4381533), (9, 2434185), (13, 1685205), (15, 1460511), (19, 1153035), (27, 811395), (39, 561735), (45, 486837), (57, 384345), (65, 337041), (73, 300105), (81, 270465), (95, 230607), (117, 187245), (135, 162279), (171, 128115), (195, 112347), (219, 100035), (243, 90155), (247, 88695), (285, 76869), (351, 62415), (365, 60021), (405, 54093), (513, 42705), (585, 37449), (657, 33345), (741, 29565), (855, 25623), (949, 23085), (1053, 20805), (1095, 20007), (1215, 18031), (1235, 17739), (1387, 15795), (1539, 14235), (1755, 12483), (1971, 11115), (2223, 9855), (2565, 8541), (2847, 7695), (3159, 6935), (3285, 6669), (3705, 5913), (4161, 5265), (4617, 4745)]