21706840

素因数分解:

$2^3\times 5^1\times {\mathrm{127}}^1\times {\mathrm{4273}}^1$

素因数の和:4411

約数の個数: 32

約数和(自身を含む): 49236480

約数和(自身を除く): 27529640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 127, 254, 508, 635, 1016, 1270, 2540, 4273, 5080, 8546, 17092, 21365, 34184, 42730, 85460, 170920, 542671, 1085342, 2170684, 2713355, 4341368, 5426710, 10853420, 21706840]

約数ペア:

[(1, 21706840), (2, 10853420), (4, 5426710), (5, 4341368), (8, 2713355), (10, 2170684), (20, 1085342), (40, 542671), (127, 170920), (254, 85460), (508, 42730), (635, 34184), (1016, 21365), (1270, 17092), (2540, 8546), (4273, 5080)]