21277320

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{281}}^1\times {\mathrm{631}}^1$

素因数の和:926

約数の個数: 64

約数和(自身を含む): 64160640

約数和(自身を除く): 42883320

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 281, 562, 631, 843, 1124, 1262, 1405, 1686, 1893, 2248, 2524, 2810, 3155, 3372, 3786, 4215, 5048, 5620, 6310, 6744, 7572, 8430, 9465, 11240, 12620, 15144, 16860, 18930, 25240, 33720, 37860, 75720, 177311, 354622, 531933, 709244, 886555, 1063866, 1418488, 1773110, 2127732, 2659665, 3546220, 4255464, 5319330, 7092440, 10638660, 21277320]

約数ペア:

[(1, 21277320), (2, 10638660), (3, 7092440), (4, 5319330), (5, 4255464), (6, 3546220), (8, 2659665), (10, 2127732), (12, 1773110), (15, 1418488), (20, 1063866), (24, 886555), (30, 709244), (40, 531933), (60, 354622), (120, 177311), (281, 75720), (562, 37860), (631, 33720), (843, 25240), (1124, 18930), (1262, 16860), (1405, 15144), (1686, 12620), (1893, 11240), (2248, 9465), (2524, 8430), (2810, 7572), (3155, 6744), (3372, 6310), (3786, 5620), (4215, 5048)]