21121840

素因数分解:

$2^4\times 5^1\times {\mathrm{83}}^1\times {\mathrm{3181}}^1$

素因数の和:3277

約数の個数: 40

約数和(自身を含む): 49715568

約数和(自身を除く): 28593728

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 83, 166, 332, 415, 664, 830, 1328, 1660, 3181, 3320, 6362, 6640, 12724, 15905, 25448, 31810, 50896, 63620, 127240, 254480, 264023, 528046, 1056092, 1320115, 2112184, 2640230, 4224368, 5280460, 10560920, 21121840]

約数ペア:

[(1, 21121840), (2, 10560920), (4, 5280460), (5, 4224368), (8, 2640230), (10, 2112184), (16, 1320115), (20, 1056092), (40, 528046), (80, 264023), (83, 254480), (166, 127240), (332, 63620), (415, 50896), (664, 31810), (830, 25448), (1328, 15905), (1660, 12724), (3181, 6640), (3320, 6362)]