21003705

素因数分解:

$3^5\times 5^1\times {\mathrm{59}}^1\times {\mathrm{293}}^1$

素因数の和:372

約数の個数: 48

約数和(自身を含む): 38525760

約数和(自身を除く): 17522055

約数列:

[1, 3, 5, 9, 15, 27, 45, 59, 81, 135, 177, 243, 293, 295, 405, 531, 879, 885, 1215, 1465, 1593, 2637, 2655, 4395, 4779, 7911, 7965, 13185, 14337, 17287, 23733, 23895, 39555, 51861, 71199, 71685, 86435, 118665, 155583, 259305, 355995, 466749, 777915, 1400247, 2333745, 4200741, 7001235, 21003705]

約数ペア:

[(1, 21003705), (3, 7001235), (5, 4200741), (9, 2333745), (15, 1400247), (27, 777915), (45, 466749), (59, 355995), (81, 259305), (135, 155583), (177, 118665), (243, 86435), (293, 71685), (295, 71199), (405, 51861), (531, 39555), (879, 23895), (885, 23733), (1215, 17287), (1465, 14337), (1593, 13185), (2637, 7965), (2655, 7911), (4395, 4779)]