21977319

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^2\times {\mathrm{223}}^1$

素因数の和:284

約数の個数: 48

約数和(自身を含む): 38234112

約数和(自身を除く): 16256793

約数列:

[1, 3, 7, 13, 19, 21, 39, 57, 91, 133, 223, 247, 273, 361, 399, 669, 741, 1083, 1561, 1729, 2527, 2899, 4237, 4683, 4693, 5187, 7581, 8697, 12711, 14079, 20293, 29659, 32851, 55081, 60879, 80503, 88977, 98553, 165243, 241509, 385567, 563521, 1046539, 1156701, 1690563, 3139617, 7325773, 21977319]

約数ペア:

[(1, 21977319), (3, 7325773), (7, 3139617), (13, 1690563), (19, 1156701), (21, 1046539), (39, 563521), (57, 385567), (91, 241509), (133, 165243), (223, 98553), (247, 88977), (273, 80503), (361, 60879), (399, 55081), (669, 32851), (741, 29659), (1083, 20293), (1561, 14079), (1729, 12711), (2527, 8697), (2899, 7581), (4237, 5187), (4683, 4693)]