21768345

素因数分解:

$3^4\times 5^1\times {\mathrm{59}}^1\times {\mathrm{911}}^1$

素因数の和:987

約数の個数: 40

約数和(自身を含む): 39726720

約数和(自身を除く): 17958375

約数列:

[1, 3, 5, 9, 15, 27, 45, 59, 81, 135, 177, 295, 405, 531, 885, 911, 1593, 2655, 2733, 4555, 4779, 7965, 8199, 13665, 23895, 24597, 40995, 53749, 73791, 122985, 161247, 268745, 368955, 483741, 806235, 1451223, 2418705, 4353669, 7256115, 21768345]

約数ペア:

[(1, 21768345), (3, 7256115), (5, 4353669), (9, 2418705), (15, 1451223), (27, 806235), (45, 483741), (59, 368955), (81, 268745), (135, 161247), (177, 122985), (295, 73791), (405, 53749), (531, 40995), (885, 24597), (911, 23895), (1593, 13665), (2655, 8199), (2733, 7965), (4555, 4779)]