18221440

素因数分解:

$2^7\times 5^1\times {\mathrm{71}}^1\times {\mathrm{401}}^1$

素因数の和:491

約数の個数: 64

約数和(自身を含む): 44284320

約数和(自身を除く): 26062880

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 71, 80, 128, 142, 160, 284, 320, 355, 401, 568, 640, 710, 802, 1136, 1420, 1604, 2005, 2272, 2840, 3208, 4010, 4544, 5680, 6416, 8020, 9088, 11360, 12832, 16040, 22720, 25664, 28471, 32080, 45440, 51328, 56942, 64160, 113884, 128320, 142355, 227768, 256640, 284710, 455536, 569420, 911072, 1138840, 1822144, 2277680, 3644288, 4555360, 9110720, 18221440]

約数ペア:

[(1, 18221440), (2, 9110720), (4, 4555360), (5, 3644288), (8, 2277680), (10, 1822144), (16, 1138840), (20, 911072), (32, 569420), (40, 455536), (64, 284710), (71, 256640), (80, 227768), (128, 142355), (142, 128320), (160, 113884), (284, 64160), (320, 56942), (355, 51328), (401, 45440), (568, 32080), (640, 28471), (710, 25664), (802, 22720), (1136, 16040), (1420, 12832), (1604, 11360), (2005, 9088), (2272, 8020), (2840, 6416), (3208, 5680), (4010, 4544)]