21517905

素因数分解:

$3^1\times 5^1\times {\mathrm{37}}^1\times {\mathrm{137}}^1\times {\mathrm{283}}^1$

素因数の和:465

約数の個数: 32

約数和(自身を含む): 35743104

約数和(自身を除く): 14225199

約数列:

[1, 3, 5, 15, 37, 111, 137, 185, 283, 411, 555, 685, 849, 1415, 2055, 4245, 5069, 10471, 15207, 25345, 31413, 38771, 52355, 76035, 116313, 157065, 193855, 581565, 1434527, 4303581, 7172635, 21517905]

約数ペア:

[(1, 21517905), (3, 7172635), (5, 4303581), (15, 1434527), (37, 581565), (111, 193855), (137, 157065), (185, 116313), (283, 76035), (411, 52355), (555, 38771), (685, 31413), (849, 25345), (1415, 15207), (2055, 10471), (4245, 5069)]