21991160

素因数分解:

$2^3\times 5^1\times {\mathrm{503}}^1\times {\mathrm{1093}}^1$

素因数の和:1607

約数の個数: 32

約数和(自身を含む): 49623840

約数和(自身を除く): 27632680

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 503, 1006, 1093, 2012, 2186, 2515, 4024, 4372, 5030, 5465, 8744, 10060, 10930, 20120, 21860, 43720, 549779, 1099558, 2199116, 2748895, 4398232, 5497790, 10995580, 21991160]

約数ペア:

[(1, 21991160), (2, 10995580), (4, 5497790), (5, 4398232), (8, 2748895), (10, 2199116), (20, 1099558), (40, 549779), (503, 43720), (1006, 21860), (1093, 20120), (2012, 10930), (2186, 10060), (2515, 8744), (4024, 5465), (4372, 5030)]