20287840

素因数分解:

$2^5\times 5^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{149}}^1$

素因数の和:224

約数の個数: 96

約数和(自身を含む): 51710400

約数和(自身を除く): 31422560

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 32, 37, 40, 46, 74, 80, 92, 115, 148, 149, 160, 184, 185, 230, 296, 298, 368, 370, 460, 592, 596, 736, 740, 745, 851, 920, 1184, 1192, 1480, 1490, 1702, 1840, 2384, 2960, 2980, 3404, 3427, 3680, 4255, 4768, 5513, 5920, 5960, 6808, 6854, 8510, 11026, 11920, 13616, 13708, 17020, 17135, 22052, 23840, 27232, 27416, 27565, 34040, 34270, 44104, 54832, 55130, 68080, 68540, 88208, 109664, 110260, 126799, 136160, 137080, 176416, 220520, 253598, 274160, 441040, 507196, 548320, 633995, 882080, 1014392, 1267990, 2028784, 2535980, 4057568, 5071960, 10143920, 20287840]

約数ペア:

[(1, 20287840), (2, 10143920), (4, 5071960), (5, 4057568), (8, 2535980), (10, 2028784), (16, 1267990), (20, 1014392), (23, 882080), (32, 633995), (37, 548320), (40, 507196), (46, 441040), (74, 274160), (80, 253598), (92, 220520), (115, 176416), (148, 137080), (149, 136160), (160, 126799), (184, 110260), (185, 109664), (230, 88208), (296, 68540), (298, 68080), (368, 55130), (370, 54832), (460, 44104), (592, 34270), (596, 34040), (736, 27565), (740, 27416), (745, 27232), (851, 23840), (920, 22052), (1184, 17135), (1192, 17020), (1480, 13708), (1490, 13616), (1702, 11920), (1840, 11026), (2384, 8510), (2960, 6854), (2980, 6808), (3404, 5960), (3427, 5920), (3680, 5513), (4255, 4768)]